Radio waves and light waves are __________.

• A) Electromagnetic and transverse both
• B) Transverse waves
• C) Electromagnetic and longitudinal both
• D) Longitudinal waves

If an electron of charge is accelerated through a potential difference V, it will acquire energy

• A) 2V
• B) V/2
• C) E/2
• D) Ve

Force per unit charge is:

• A) Electric field intensity
• B) Lorentz force
• C) Electric potential
• D) Electric Flux

Electromagnetic waves are transverse in nature, as evident by the phenomenon of ______.

• A) Polarization
• B) Interference
• C) Reflection
• D) Diffraction

What is the direction of the area vector for a flat surface in the context of magnetic flux?

• A) Perpendicular to the surface
• B) Directed randomly
• C) Parallel to the surface
• D) Tangential to the surface

If velocity of a conductor moving through a magnetic field B is made zero then motional emf is:

• A) -v/LB
• B) Zero
• C) -BL/v
• D) -vBL

Work done on a charged particle moving in uniform magnetic field is:

• A) Negative
• B) Zero
• C) Minimum
• D) Maximum

In the context of capacitors, how is energy related to the electric field strength?

• A) Energy is inversely proportional to the electric field strength
• B) Energy is proportional to the square of the electric field strength
• C) Energy is unrelated to the electric field strength
• D) Energy is directly proportional to the electric field strength

A stationary charge placed in a magnetic field will experience:

• A) An electric force.
• B) Both electric and magnetic forces.
• C) A magnetic force.
• D) No force.

What is the relationship between the electric field and charges on a perfect electric conductor's surface?

• A) Electric field is normal to the surface and proportional to charge density
• B) Electric field is proportional to charge density
• C) Electric field is discontinuous and inversely proportional to charge density
• D) Electric field is always zero

If a conductor is placed between the plates of a capacitor, what will happen to the potential difference between the plates?

• A) It will be maintained
• B) It will increase
• C) It will decrease
• D) It will become zero

Total flux through a closed surface depends on:

• A) Medium only
• B) Charge and – N
• C) Charge enclosed
• D) Shape of surface

Energy density in case of a capacitor is always proportional to:

• A) E 2
• B) CV
• C) C 2
• D) V 2

Potentiometer can be used as

• A) Galvanometer
• B) Potential divider
• C) Ohm meter
• D) Ammeter

Two parallel straight wires carrying current in same direction will:

• A) Repel each other
• B) No effect
• C) Attract each other
• D) May repel or attract

If the velocity of a charged particle in perpendicular electric and magnetic field is 7.27 x 106 m/s and the Electric field is 6 x 106 N/c, what should be the value of the magnetic field?

• A) 0.45 T
• B) 0.94 T
• C) 0.78 T
• D) 0.83 T

When a dielectric material is introduced between the plates of a capacitor, what does effect it have on the capacitance?

• A) Remains the same
• B) Depends on the dielectric constant
• C) Decreases
• D) Increases

The ability of a capacitor to store charge depends upon

• A) area of plates
• B) all of these
• C) distance between plates
• D) type of dielectric used

If Io is the peak value of an AC supply, then its rms value is given as Irms:

• A) √2 Io
• B) Io/0.707
• C) Io/√2
• D) Io/2

When we accelerate the charge, which types of waves are produced?

• A) Electromagnetic waves
• B) Stationary waves
• C) Travelling waves
• D) Mechanical waves