Objective Questions

In a moving coil galvanometer, pole faces of the U-shaped magnet are made conca…

The return spring of a galvanometer has spring constant 0.5 N/m. If the coil ha…

A uniform magnetic field causes circular motion if the charge moves

Which of the following materials is most suitable for making a permanent magnet?

What part will surely tell that a given motor is a DC motor and not an AC type?

An electron is travelling at right angles to a uniform magnetic field of flux d…

The law which states "an induced e.m.f. always gives rise to a current whose ma…

For an electron, the magnitude of the magnetic force on it is

Which of the following methods of magnetising a steel rod will produce the stro…

An electron moves in a uniform magnetic field B with a velocity of 1x107 m/s. I…

Strength of magnetic field of solenoid can be increased by adding a core made of

By how many percent is the torque of a motor decreased if its permanent magnets…

Weakest force in nature is?

The working of a meter is based on the use of a permanent magnet. In order to p…

Which one of the following options is used for the effect in which a changing c…

The flux linking a coil changes from 5.0x10-4 Wb to 2.2x10-4 Wb in 0.025 second…

What unit is used for inductance?

In generators, rate of change of flux linkage is maximum when the coil is in:

An emf of 16 V is induced in a coil of inductance 4 H. The rate of change of cu…

Which one of the following does NOT change the magnetic flux linking the conduc…

In a magnet-coil arrangement where the flux of the magnet links the coil, E.M.F…

Which of the following is true for an a.c. circuit?

When an alternating signal flows through an inductor:

Find the amplitude, phase, period, and frequency of the sinusoid V(t) = 12 cos(…

A transformer which is 80% efficient gives an output of 12 V and 4 A. What is t…

An a.c. circuit has a peak voltage of 100 V across a 50 Ohm resistor. What are …

When an alternating signal flows through a capacitor:

A transformer has 200 turns in its primary coil and 600 turns in its secondary …

An RLC circuit has R = 100 Ohm, L = 1 H, C = 10 uF, and w = 400 rad/s. Determin…

A step-down transformer changes:

The primary coil of a transformer is supplied with 45 V. What is the ratio of t…

Transformer core losses include:

When an object is displaced from its equilibrium position, the oscillating syst…

In a loss-free R-L-C circuit, the transient current is:

The power dissipated by a 72 Ohm resistor connected to a sinusoidal AC source i…

Which of the following is the correct relationship between PEAK value and R.M.S…

A given RLC circuit has R=100 Ohm, L=1H and C=10uF all connected in series with…

A sinusoidal voltage is applied to a series RLC circuit with L = 10.0mH, C = 10…

Two waves traveling on a string in the same direction have frequency 100 Hz, wa…

The amount of diffraction that a wave undergoes as it passes through an opening…

In a Young's double slit experiment, the first dark fringe makes an angle of 1 …

Which of the following is true about p-n junction diode?
i. Forward bias cu…

Based on the document, what phenomenon induces an electromotive force (emf)?

According to Faraday's Law, the induced emf in a circuit is proportional to wha…

Which of the following equations correctly represents Faraday's Law of Inductio…

For the easiest case, with a constant magnetic field (B) and a flat surface of …

According to the document, what are the units for magnetic flux?

When the magnetic field (B) is not constant or the surface is not flat, the mag…

In Faraday's experiments, what was observed when a magnet was moved relative to…

One of Faraday's experiments described in the document involved two coils. What…

What is the fundamental principle of Lenz's Law regarding induced emf and curre…

According to Lenz's Law, if the magnetic flux through a loop is decreasing, wha…

How does moving a loop in a uniform and constant magnetic field induce an EMF, …

The document states that 'moving a circuit in a magnetic field produces an emf …

What is explicitly stated as the cause of an induced electric field (E) in the …

In comparing electrostatic fields (E_e) and induced electric fields (E), which …

For a magnetic field with axial or cylindrical symmetry, what is the shape of t…

According to the document, what are the units of magnetic flux?

When considering magnetic flux in a non-uniform magnetic field or over a non-fl…

In Faraday's experiments described on page 5, the induced current in the left-h…

What is the primary cause of 'Motional EMF' as described in the document?

If a conducting loop is moving with velocity 'v' into a uniform magnetic field …

When a conducting loop is moving into a region where the inward magnetic flux i…

What is the principle illustrated by a moving circuit in a magnetic field that …

For a rotating loop of area A in a uniform magnetic field B, rotating with angu…

What type of current does a rotating loop in a magnetic field (an electric gene…

Which of the following methods can be used to create an EMF in a conducting loo…

The document emphasizes that to generate EMF by changing B or moving a loop, 'N…

In the context of 'Induced Electric Fields', why is the force on a stationary c…

What is the primary cause of an 'induced electric field E' to appear, as distin…

How is Faraday's Law represented in terms of an induced electric field E and an…

According to the comparison on page 30, what is a key difference between an ele…

According to Lenz's Law, if a magnet is moved towards a conducting loop,…

What is the primary characteristic that distinguishes Motional EMF from EMF ind…

In the motional EMF example (Page 17-20), where the magnetic field (B) points i…

The principle that moving a circuit in a magnetic field produces an EMF exactly…

What type of electric current is specifically generated by a rotating loop in a…

To create an EMF in a conducting loop situated within a magnetic field, which o…

What causes an induced electric field (E) to appear?

When a current starts to flow in a stationary conductor placed in a time-varyin…

Which equation correctly represents Faraday's Law in terms of the induced elect…

What is the fundamental nature of the induced electric field (E) compare…

Can an induced electric field exist in the absence of a conductor?

For a magnetic field with axial or cylindrical symmetry, what is the characteri…

Regarding the line integral of the electric field over a closed loop (∫E⋅dl), w…

What is the primary cause of an electrostatic field?

The work or energy difference associated with an electrostatic field exhibits w…

According to the document, under what conditions is the integral form of magnet…

Based on Lenz's Law as described in the document, if the magnetic flux through …

For a rectangular loop of depth D moving with velocity v perpendicular t…

The rotating loop described in the document, when placed in a uniform magnetic …

The document emphasizes the statement 'Nothing is for free!' in the context of …

According to the document, what causes the appearance of an induced electric fi…

What is a key characteristic that distinguishes an induced electric field (E) f…

When comparing electrostatic fields (Ee) and induced electric fields (E), which…

In the comparison between electrostatic fields and induced electric fields, whi…

Does an induced electric field (E) exist in a region of space if a time-varying…

For a time-varying magnetic field possessing axial or cylindrical symmetry, wha…

In Faraday's experiments involving changing currents, the induced current in a …

In the example calculation involving a solenoid and a larger coil placed around…