Electromagnetic Fields MCQs (Set-2)

A 2 μC charge in a 3 kN/C electric field feels what force magnitude?

For parallel plates with unchanged separation and dielectric, doubling area does what to C?

If plate separation doubles while area and dielectric stay fixed, capacitance becomes what?

A 2 μF capacitor at 10 V stores how much charge?

How much energy does a 2 μF capacitor store at 10 V?

Two 4 μF capacitors in parallel have what equivalent capacitance?

A uniform 100 N/C field crosses a 0.02 m² surface normally. Find electric flux.

No net charge lies inside a closed Gaussian surface. What is its net electric flux?

Along a uniform 200 V/m field, points 0.5 m apart have what potential-difference magnitude?

For a solid conductor with no cavity in electrostatic equilibrium, where does excess charge reside?

For velocity parallel to B, what magnetic force acts on a point charge?

A 1 C charge moves at 2 m/s perpendicular to a 3 T field. Find magnetic force.

A 1 m wire carries 2 A at right angles to a 0.5 T field. Find its force.

At twice the radial distance from a long straight wire, magnetic field magnitude becomes what?

A 2 T field crosses 0.5 m² normally. What magnetic flux results?

Flux through one loop changes by 0.02 Wb in 0.01 s. Find average emf magnitude.

Ten identical turns each experience a 0.01 Wb flux change in 0.1 s. What average emf results?

An inductor of 2 H carrying 3 A stores how much magnetic energy?

Relative permeability is the ratio of material permeability to what?

For a long ideal solenoid, doubling turns per metre at fixed current does what to B?

A 100 MHz wave in vacuum has approximately what wavelength?

For a vacuum plane wave, E=300 V/m and B=1 μT. What does E/B equal?

What SI unit measures Poynting-vector magnitude?

Electric polarization P describes dipole moment per unit what?

Which changing field contributes to magnetic circulation in the Ampère–Maxwell law?