Q. What is the effect of increasing the speed of a magnet moving through a coil?
A.Induced current decreases
B.Induced current increases
C.No change in induced current
D.Induced current becomes zero
Solution
Increasing the speed of the magnet increases the rate of change of magnetic flux through the coil, which increases the induced current according to Faraday's law.
Q. What is the force experienced by a charge q moving with velocity v in a magnetic field B?
A.qvB
B.qvB sin(θ)
C.qvB cos(θ)
D.qvB tan(θ)
Solution
The force experienced by a charge q moving with velocity v in a magnetic field B is given by the Lorentz force law: F = q(v × B), which can be expressed as F = qvB sin(θ), where θ is the angle between the velocity and the magnetic field.
Q. What is the force experienced by a charge q moving with velocity v in a magnetic field B at an angle θ?
A.qvB
B.qvB sin(θ)
C.qvB cos(θ)
D.qvB tan(θ)
Solution
The magnetic force on a charge moving in a magnetic field is given by F = qvB sin(θ), where θ is the angle between the velocity and the magnetic field.
Q. What is the formula for calculating the magnetic force on a charged particle moving in a magnetic field?
A.F = qE
B.F = qvBsinθ
C.F = mv^2/r
D.F = qvE
Solution
The magnetic force on a charged particle is given by F = qvBsinθ, where q is the charge, v is the velocity, B is the magnetic field, and θ is the angle between v and B.
Q. What is the formula for the force experienced by a charged particle moving in a magnetic field?
A.F = qvB sin(θ)
B.F = qvB cos(θ)
C.F = qB
D.F = qE
Solution
The force on a charged particle moving in a magnetic field is given by F = qvB sin(θ), where θ is the angle between the velocity and the magnetic field.
Q. What is the formula for the magnetic force experienced by a charged particle moving in a magnetic field?
A.F = qE
B.F = qvBsin(θ)
C.F = mv^2/r
D.F = BIL
Solution
The magnetic force on a charged particle is given by F = qvBsin(θ), where q is the charge, v is the velocity, B is the magnetic field strength, and θ is the angle between the velocity and the magnetic field.
Q. What is the formula for the magnetic force on a charged particle moving in a magnetic field?
A.F = qE
B.F = qvBsinθ
C.F = mv^2/r
D.F = qvE
Solution
The magnetic force on a charged particle is given by F = qvBsinθ, where q is the charge, v is the velocity, B is the magnetic field strength, and θ is the angle between v and B.
Q. What is the induced EMF in a loop of wire when the magnetic field through it changes at a rate of 5 T/s?
A.0 V
B.5 V
C.10 V
D.15 V
Solution
The induced EMF (ε) is given by Faraday's law of electromagnetic induction: ε = -dΦ/dt. If the rate of change of magnetic field is 5 T/s, then ε = 5 V.
The integral form of Ampere's Law states that the line integral of the magnetic field B around a closed loop is equal to μ₀ times the enclosed current I.