Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view Onyou Class 7,25 тыс. подписчиков Скачать
Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view Скачать
An object is placed at (1) 10 cm, (ii) 5 cm in front of a concave mirror of radius of curvature 15 c Скачать
A mobile phone lies along the principal axis of a concave mirror, as shown in Fig. 9.7. Show by suit Скачать
Suppose that the lower half of the concave mirror's reflecting surface in Fig. 9.6 is covered Скачать
In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0 x Скачать
Suppose that the electric field amplitude of an electromagnetic wave is E = 120 N/C and that its fre Скачать
A charged particle oscillates about its mean equilibrium position with a frequency of 10⁹ Hz. What Скачать
A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding waveleng Скачать
A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directi Скачать
What physical quantity is the same for X-rays of wavelength 10-¹⁰m, red light of wavelength 6800 Å Скачать
A parallel plate capacitor (Fig. 8.6) made of circular plates each of radius R = 6.0 cm has a capaci Скачать
Figure 8.5 shows a capacitor made of two circular plates each of radius 12 cm, and separated by 5.0 Скачать
The magnetic field in a plane electromagnetic wave is given by B = (2 x 10-7) T sin (0.5×10³x+1.5×1 Скачать
A plane electromagnetic wave of frequency 25 MHz travels in free space along the x-direction. At a p Скачать
In Exercises 7.3 and 7.4, what is the net power absorbed by each circuit over a complete cycle. Expl Скачать
A charged 30 µF capacitor is connected to a 27 mH inductor. What is the angular frequency of free os Скачать
A series LCR circuit with R = 20 Ω, L = 1.5 H and C = 35 µF is connected to a variable-frequency 200 Скачать
Figure 7.17 shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H C Скачать
A 60 µF capacitor is connected to a 110 V. 60 Hz ac supply. Determine the rms value of the current i Скачать
A 44 mH inductor is connected to 220 V, 50 Hz ac supply. Determine the rms value of the current in t Скачать
The peak voltage of an ac supply is 300 V. What is the rms voltage?(b) The rms value of current i Скачать
A 100 Ω resistor is connected to a 220 V, 50 Hz ac supply.(a) What is the rms value of current in th Скачать
Suppose the frequency of the source in the previous example can be varied. (a) What is the frequency Скачать
A sinusoidal voltage of peak value 283 V and frequency 50 Hz is applied to a series LCR circuit in w Скачать
For circuits used for transporting electric power, a low power factor implies large power loss in tr Скачать
A resistor of 200 ohm and a capacitor of 15.0 µF are connected in series to a 220 V, 50 Hz ac source Скачать
A light bulb and an open coil inductor are connected to an ac source through a key as shown in Fig. Скачать
A 15.0 µF capacitor is connected to a 220 V, 50 Hz source. Find the capacitive reactance and the cur Скачать
A pure inductor of 25.0 mH is connected to a source of 220 V. Find the inductive reactance and rms Скачать
A lamp is connected in series with a capacitor. Predict your observations for dc and ac connections. Скачать
A light bulb is rated at 100W for a 220 V supply. Find (a) the resistance of the bulb; (b) the peak Скачать
A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes from 0 Скачать
Current in a circuit falls from 5.0 A to 0.0 A in 0.1 s. If an average emf of 200 V induced, give an Скачать
A horizontal straight wire 10 m long extending from east to west is falling with a, speed of 5.0 m/s Скачать
A 1.0 m long metallic rod is rotated with an angular frequency of 400 rad s¹ about an axis normal to Скачать
A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of uniform Скачать
A long solenoid with 15 turns per cm has a small loop of area 2.0 cm² placed inside the solenoid nor Скачать
Use Lenz's law to determine the direction of induced current in the situations described by Fig. 6.1 Скачать
Kamla peddles a stationary bicycle. The pedals of the bicycle are attached to a 100 turn coil of are Скачать
Obtain the expression for the magnetic energy stored in a solenoid in terms of magnetic field B area Скачать
Two concentric circular coils, one of small radius r, and the other of large radius r₂, such that r₁ Скачать
A wheel with 10 metallic spokes each 0.5 m long is rotated with a speed of 120 rev/min in a plane no Скачать
A metallic rod of 1 m length is rotated with a frequency of 50 rev/s, with one end hinged at the cen Скачать
A closed loop is held stationary in the magnetic field between the north and south poles of two perm Скачать
Figure 6.7 shows planar loops of different shapes moving out of or into a region of a magnetic field Скачать
A circular coil of radius 10 cm. 500 turns and resistance 2 is placed with its plane perpendicular Скачать
A square loop of side 10 cm and resistance 0.5 is placed vertically in the east-west plane. A unifor Скачать
Consider Experiment 6.2. (a) What would you do to obtain a large deflection of the galvanometer? (b) Скачать
If the bar magnet in exercise 5.13 is turned around by 180°, where will the new null points be locat Скачать
A short bar magnet placed in a horizontal plane has its axis aligned along the magnetic north-south Скачать
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Magnetising Intensity | Magnetisation Intensity | Magnetic Permeability | Magnetic Susceptibility Скачать
A short bar magnet has a magnetic moment of 0.48 J T¹, Give the direction and magnitude of the magni Скачать
A closely wound solenoid of 2000 turns and area of cross-section 1.6 x 10-⁴m², carrying a current o Скачать
A bar magnet of magnetic moment 1.5 J T¹ lies aligned with the direction of a uniform magnetic field Скачать
If the solenoid in Exercise 5.5 is free to turn about the vertical direction and a uniform horizonta Скачать
A closely wound solenoid of 800 turns and area of cross section 2.5 x 10⁴ m² carries a current of 3. Скачать
A short bar magnet of magnetic moment m = 0.32 JT¹ is placed in a uniform magnetic field of 0.15 T. Скачать
A short bar magnet placed with its axis at 30° with a uniform external magnetic field of 0.25 T expe Скачать
A solenoid has a core of a material with relative permeability 400. The windings of the solenoid are Скачать
Magnetic field lines show the direction (at every point) along which a small magnetised needle align Скачать
Figure shows a small magnetised needle P placed at a point O. The arrow shows the direction of i Скачать
Must every magnetic configuration have a north pole and a south pole? What about the field due to a Скачать
What happens if a bar magnet is cut into two pieces: (i) transverse to its length, (ii) along its le Скачать
In Exercise 4.11 obtain the frequency of revolution of the electron in its circular orbit. Does the Скачать
In a chamber, a uniform magnetic field of 6.5 G (1 G = 10‐⁴ T) is maintained. An electron is shot in Скачать
Two moving coil meters, M₁ and M₂ have the following particulars:R₁ = 10 Ω. Ν₁ = 30,A₁ = 3.6 x 103 m Скачать
A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspende Скачать
A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the Скачать
Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direct Скачать
A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The Скачать
What is the magnitude of magnetic force per unit length on a wire carrying a current of 8 A and maki Скачать
A horizontal overhead power line carries a current of 90 A in east to west direction. What is the ma Скачать
A long straight wire in the horizontal plane carries a current of 50 A in north to south direction. Скачать
A long straight wire carries a current of 35 A. What is the magnitude of the field B at a point 20 c Скачать
A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. Скачать
In the circuit (Fig. 4.23) the current is to be measured. What is the value of the current if the am Скачать
A current-carrying circular loop lies on a smooth horizontal plane. Can a uniform magnetic field be Скачать
A 100 turn closely wound circular coil of radius 10 cm carries a current of 3.2 A. (a) What is the f Скачать
A solenoid of length 0.5 m has a radius of 1 cm and is made up of 500 turns. It carries a current of Скачать
The horizontal component of the earth's magnetic field at a certain place is 3.0 x10^-5 T and the di Скачать
Figure 4.13 shows a long straight wire of a circular cross-section (radius a) carrying steady curren Скачать
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Consider a tightly wound 100 turn coil of radius 10 cm. carrying a current of 1 A. What is the magni Скачать
A straight wire carrying a current of 12 A is bent into a semi-circular arc of radius 2.0 cm as show Скачать
A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid-air Скачать
An element dl = dx i is placed at the origin and carries a large current I = 10 A (Fig. 4.8). What i Скачать
Motion Of Charged Particle in a Magnetic Field || Moving Charges and Magnetism || Physics Ncert Скачать
What is the radius of the path of an electron (mass 9 x 10-31 kg and charge 1.6 x 10-19 C) moving at Скачать
If the magnetic field is parallel to the positive y-axis and the charged particle is moving along th Скачать
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The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5 x 10²⁸ m³ Скачать
A storage battery of emf 8.0 V and internal resistance 0.5 is being charged by a 120 V dc supply Скачать
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A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which Скачать
A silver wire has a resistance of 2.1 ohm at 27.5 °C, and a resistance of 2.7 ohm at 100 °C. Determi Скачать
A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6.0 x 1 Скачать
At room temperature (27.0 °C) the resistance of a heating element is 100 ohm What is the temperature Скачать
A battery of emf 10 V and internal resistance 3 2 is connected to a resistor. If the current in the Скачать
The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Скачать
The four arms of a Wheatstone bridge (Fig. 3.19) have the following resistances: ΑΒ = 100 BC = 10 Скачать
A battery of 10 V and negligible internal resistance is connected across the diagonally opposite cor Скачать
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The resistance of the platinum wire of a platinum resistance thermometer at the ice point is 5 ohm Скачать
An electric toaster uses nichrome for its heating element. When a negligibly small current passes th Скачать
In Example 3.1. the electron drift speed is estimated to be only a few mm s¹ for currents in the ran Скачать
Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area Скачать
A 600pF capacitor is charged by a 200V supply. It is then disconnected from the supply and is connec Скачать
A 12pF capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capac Скачать
Explain what would happen if in the capacitor given in Exercise 2.8, a 3 mm thick mica sheet (of die Скачать
In a parallel plate capacitor with air between the plates, each plate has an area of 6 x 10-³m² and Скачать
Three capacitors of capacitances 2 pF, 3 pF and 4 pF are connected in parallel What is the total cap Скачать
Three capacitors each of capacitance 9 pF are connected in series.(a) What is the total capacitance Скачать
A parallel plate capacitor with air between the plates has a capacitance of 8 pF (1pF = 10-12 F). Wh Скачать
A spherical conductor of radius 12 cm has a charge of 1.6 × 10-⁷C distributed uniformly on its surfa Скачать
Two charges 2 μC and -2 µC are placed at points A and B 6 cm apart.(a) Identify an equipotential sur Скачать
A regular hexagon of side 10 cm has a charge 5 µC at each of its vertices. Calculate the potential a Скачать
Two charges 5 × 10‐⁸ C and -3 x 10-⁸C are located 16 cm apart. At what point(s) on the line joining Скачать
A 900 pF capacitor is charged by 100 V battery [Fig. 2.31(a)]. How much electrostatic energy is stor Скачать
A network of four 10 µF capacitors is connected to a 500 V supply, as shown in Fig. 2.29. Determine Скачать
A slab of material of dielectric constant K has the same area as the plates of a parallel-plate capa Скачать
A molecule of a substance has a permanent electric dipole moment of magnitude 10^-29 C m. A mole of Скачать
Determine the electrostatic potential energy of a system consisting of two charges 7 µc and -2 µc (a Скачать
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Four charges are arranged at the corners of a square ABCD of side d, as shown in Fig. 2.15.(a) Find Скачать
Figures 2.8 (a) and (b) show the field lines of a positive and negative point charge respectively. Скачать
Potential Energy Of a Dipole in an External Field | Electrostatic Potential And Capacitance | Ncert Скачать
Relation Between Electric Field and Potential | Potential Gradient | Class 12th Physics | Ncert Скачать
Two charges 3 x 10-⁸ C and -2 x 10-⁸ C are located 15 cm apart. At what point on the line joining th Скачать
Calculate the potential at a point P due to a charge of 4 × 10^-7 C located 9 cm away. (b) Hence ob Скачать
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Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates Скачать
An infinite line charge produces a field of 9 × 10^4 N/C at a distance of 2 cm. Calculate the linea Скачать
A uniformly charged conducting sphere of 2.4 m diameter has a surface charge density of 80.0 µC/m². Скачать
A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the cent Скачать
A point charge causes an electric flux of -1.0 x 10³ Nm²/C to pass through a spherical Gaussian surf Скачать
A point charge of 2.0 µC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the ne Скачать
A point charge +10 µC is a distance 5 cm directly above the centre of a square of side 10 cm, as sho Скачать
Careful measurement of the electric field at the surface of a black box indicates that the net outwa Скачать
What is the net flux of the uniform electric field of Exercise 1.14 through a cube of side 20 cm ori Скачать
Consider a uniform electric field E = 3 x 10^3 î N/C. (a) What is the flux of this field through a s Скачать
Figure 1.30 shows tracks of three charged particles in a uniform electrostatic field. Give the signs Скачать
Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. Wh Скачать
A polythene piece rubbed with wool is found to have a negative charge of 3 x 10-7 С.(a) Estimate the Скачать
An electric dipole with dipole moment 4 x 10^-9 C m is aligned at 30° with the direction of a unifor Скачать
A system has two charges qA = 2.5 x 10-7 C and qB = -2.5 x 10-7 C located at points A: (0, 0, -15 cm Скачать
Two point charges qA = 3 µC and qB = -3 µC are located 20 cm apart in vacuum.(a) What is the electri Скачать
An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks Скачать
Four point charges qA= 2 μC, qB = -5 µC, qc = 2 µC, and qD = -5 µC are located at the corners of a s Скачать
When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observ Скачать
Explain the meaning of the statement 'electric charge of a body is quantised (b) Why can one ignore Скачать
Check that the ratio ke²/G mm, is dimensionless. Look up a Table of Physical Constants and determin Скачать
The electrostatic force on a small sphere of charge 0.4 µC due toanother small sphere of charge Скачать
What is the force between two small charged spheres having charges of 2 x 10^-7C and 3 x 10^-7C plac Скачать
An early model for an atom considered it to have a positively charged point nucleus of charge Ze, su Скачать
An electric field is uniform, and in the positive x direction for positiye x, and uniform with the Скачать
![A 900 pF capacitor is charged by 100 V battery [Fig. 2.31(a)]. How much electrostatic energy is stor](https://s2.save4k.org/pic/MRNMnh5nd8I/mqdefault.jpg)
