Magnetic Field MCQs

What happens to a moving charge in a magnetic field?

• It stops

• It accelerates in a straight line

• It experiences a magnetic force

• It emits light

What is the unit of magnetic field?

• Newton

• Coulomb

• Tesla

• Volt

1. What does the formula describe for F = q(v x B)?

• Electric force

• Magnetic force on a moving charge

• Magnetic field

• Gravitational force

This motion depends on the charge, speed, and direction of the particle, and the magnetic field.

• 1. Motion of a Charge in a Magnetic Field

• 1. Biot- Savart Law

• 1. Magnetic Field of Current Element

• 1. Magnetic Field of Moving Charges

What is the formula for magnetic field at the center of a circular loop?

Biot-Savart Law is used to:

• Measure electric force

• Calculate magnetic field from current

• Find voltage

• Determine resistance

The symbol μ₀ represents:

• Magnetic moment

• Electric permeability

• Permeability of free space

• Magnetic flux

In Biot-Savart law, dl is:

• Magnetic length

• Small length vector of the wire

• Distance between charges

• Loop diameter

Magnetic force is zero when:

• Velocity is zero

• Field is perpendicular

• Charge is positive

• Wire is infinite

An infinite wire carries 5A, point is 0.1m away. What is B?