Agniveer Army Technical Electrostatics & Current Questions

Two point charges of +4 μC and -4 μC are separated by a distance of 2 m. What is the magnitude of the electric field at the midpoint between them?

Which of the following statements about the Lorentz force on a moving charge is correct?

A parallel plate capacitor has a plate area of 0.5 m² and separation of 2 mm. If the dielectric constant of the medium is 2, calculate the capacitance. (ε₀ = 8.85 × 10⁻¹² F/m)

Two identical point charges repel each other with a force of 8 N when separated by 30 cm. What is the magnitude of each charge? (Take k = 9 × 10⁹ N·m²/C²)

According to Coulomb's Law, if the distance between two point charges is doubled, the electric force between them becomes:

A proton enters a magnetic field of 0.5 T at an angle of 30° to the field direction with speed 2 × 10⁶ m/s. The magnetic force on the proton is (charge of proton = 1.6 × 10⁻¹⁹ C):

A capacitor of capacitance 10 μF is charged to a potential difference of 100 V. What is the charge stored on the capacitor?

The electrostatic potential at a distance of 2 m from a point charge of 4 μC in vacuum is approximately:

The work done in bringing a charge of 5 C from infinity to a point where the electrostatic potential is 200 V is:

An electric charge of +2 C is located at the origin. What is the electric field magnitude at a distance of 3 m from this charge?

Two capacitors of capacitance 5 μF and 10 μF are connected in series across a 60 V battery. What is the equivalent capacitance?

A charge of +6 μC is placed in an electric field of magnitude 500 N/C. What is the magnitude of the electric force experienced by the charge?

A charged particle with charge q = 2 C moves with velocity v = 5 m/s perpendicular to a magnetic field B = 0.4 T. Calculate the magnetic force acting on the particle.

An electron moves in a circular path in a uniform magnetic field. If the magnetic field strength is doubled, what happens to the radius of the circular path?

Two resistors of 6 Ω and 12 Ω are connected in parallel. What is the equivalent resistance?

The SI unit of electrical resistivity is:

If the current through a resistor is doubled while keeping resistance constant, how does the power dissipated change?

A conductor has a length of 2 m, cross-sectional area of 1 mm², and resistivity of 1.6 × 10⁻⁸ Ω·m. Calculate its resistance.

A wire of resistance 10 Ω carries a current of 2 A. What is the potential difference across the wire?

A charged particle moves through crossed electric and magnetic fields without deflection. If E = 3 × 10⁵ V/m and B = 0.6 T, calculate the velocity of the particle.

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