Electromagnetism PYQ

A charged particle moves in a uniform magnetic field. If the velocity is perpendicular to the field, the path of the particle is:

A long straight wire carries a current of 10 A. The magnetic field at a distance of 0.1 m from the wire is:

The magnitude of force on a charge q moving with velocity v in a magnetic field B at angle θ is:

The electrostatic force between two point charges q₁ and q₂ separated by distance r is given by Coulomb's law as:

The electric field at a distance r from an infinitely long uniformly charged wire having linear charge density λ is:

A current carrying circular loop of radius R produces a magnetic field B at its center. At what distance from center on its axis, the magnetic field becomes B/8?

The magnetic field at the center of a circular coil of radius R carrying current I is

Two point charges +q and -q are placed at distance d apart. The electric field at the midpoint of the line joining them is:

The magnetic field at a distance r from a long straight wire carrying current I is:

A parallel plate capacitor has plate area A and separation d. It is charged to potential V. The energy stored in the capacitor is:

In an LCR series circuit, the power factor is unity. What is the phase difference between current and voltage?

A wire of resistance R is bent to form a complete circle. The resistance between two diametrically opposite points is:

An electromagnetic wave has electric field amplitude E₀ and magnetic field amplitude B₀. The ratio E₀/B₀ is equal to: