What is the SI unit of magnetic field strength?
a) Tesla
b) Weber
c) Newton
d) Coulomb
Which law states that the force on a current-carrying conductor in a magnetic field is perpendicular to both the current and the field?
a) Ampere’s Law
b) Ohm’s Law
c) Fleming’s Left-Hand Rule
d) Lenz’s Law
The magnetic force on a moving charge is zero when it moves:
a) Parallel to the magnetic field
b) Perpendicular to the magnetic field
c) At 45 degrees to the magnetic field
d) In a circular path
The direction of the magnetic field around a current-carrying conductor is determined by:
a) Fleming’s Right-Hand Rule
b) Right-Hand Thumb Rule
c) Lenz’s Law
d) Gauss’s Law
A moving charged particle experiences maximum force in a magnetic field when it moves:
a) Parallel to the field
b) Opposite to the field
c) Perpendicular to the field
d) Along the field lines
The strength of a magnetic field produced by a current-carrying wire is increased by:
a) Decreasing the current
b) Increasing the current
c) Using an insulator
d) Moving the wire faster
The Earth’s magnetic field is believed to be caused by:
a) Permanent magnets in the core
b) The rotation of the Earth
c) Moving molten iron in the core
d) The Moon’s gravitational pull
The force experienced by a charged particle moving in a uniform magnetic field follows the equation:
a) F = qE
b) F = qvB sinθ
c) F = mv²/r
d) F = qV/R
Magnetic field lines are always:
a) Open loops
b) Starting from north and ending at south
c) Closed loops
d) Discontinuous
What happens when a ferromagnetic material is placed inside a solenoid?
a) The magnetic field decreases
b) The material loses all its magnetism
c) The magnetic field increases
d) The solenoid stops working
The SI unit of magnetic flux is:
a) Tesla
b) Weber
c) Henry
d) Joule
The force on a current-carrying conductor in a magnetic field is given by:
a) F = qE
b) F = ILB sinθ
c) F = mv²/r
d) F = qV/R
The force between two parallel current-carrying conductors is:
a) Attractive if currents are in the same direction
b) Repulsive if currents are in the same direction
c) Independent of current direction
d) Always repulsive
A charged particle moving in a uniform magnetic field follows a:
a) Parabolic path
b) Circular path
c) Straight-line path
d) Zigzag path
If a wire carries a current upward and you look down at it, the magnetic field around it is:
a) Clockwise
b) Counterclockwise
c) Radial
d) Zero
A moving electron in a uniform magnetic field experiences a force that is always:
a) Parallel to its velocity
b) Opposite to its velocity
c) Perpendicular to both velocity and field
d) Zero
The magnetic dipole moment of a loop of current depends on:
a) Current and area of the loop
b) Voltage and resistance
c) Magnetic field strength
d) Charge in the loop
The magnetic field inside a solenoid is:
a) Strong and uniform
b) Weak and uniform
c) Strong and non-uniform
d) Zero
A cyclotron accelerates charged particles using:
a) Magnetic fields only
b) Electric fields only
c) Both electric and magnetic fields
d) Gravitational fields
The phenomenon of magnetic hysteresis is observed in:
a) Paramagnetic materials
b) Diamagnetic materials
c) Ferromagnetic materials
d) Non-magnetic materials
A Hall effect sensor is used to measure:
a) Voltage
b) Magnetic fields
c) Resistance
d) Temperature
Which of the following materials is not attracted to a magnet?
a) Iron
b) Nickel
c) Copper
d) Cobalt
The force between two magnetic poles is given by:
a) Coulomb’s Law
b) Biot-Savart Law
c) Ampere’s Law
d) Inverse Square Law
What is the purpose of a magnetic shielding material?
a) To block gravitational forces
b) To block magnetic fields
c) To amplify magnetic fields
d) To store magnetic energy
A moving charge in a uniform magnetic field follows a spiral path if:
a) It moves perpendicular to the field
b) It moves parallel to the field
c) It has a velocity component parallel to the field
d) It moves randomly
Which of the following does not produce a magnetic field?
a) A moving charge
b) A current-carrying wire
c) A stationary electron
d) A bar magnet
The torque on a magnetic dipole in a uniform magnetic field is given by:
a) τ = mB sinθ
b) τ = qvB
c) τ = ILB
d) τ = qE
What type of magnet is created by passing a current through a coil?
a) Permanent magnet
b) Electromagnet
c) Superconductor
d) Ferromagnet
