JEE PHYSICS UNIT 13
QUIZ NO 4
TOTAL QUESTIONS = 20
1. The SI unit of magnetic flux is
A. Weber
B. Tesla
C. Henry
D. Farad
2. The angle of dip at the magnetic equator is
A. 0°
B. 45°
C. 90°
D. 180°
3. A material is repelled by a strong magnet. The material is
A. Paramagnetic
B. Ferromagnetic
C. Diamagnetic
D. Non-magnetic
4. The Earth's magnetic field lines are
A. Parallel to the surface at the equator
B. Vertical at the equator
C. Parallel to the surface at the poles
D. Vertical at the poles
5. The magnetic susceptibility of a paramagnetic material is
A. Positive and less than one
B. Negative and less than one
C. Positive and greater than one
D. Negative and greater than one
6. The area enclosed by a hysteresis loop represents
A. Energy loss per cycle
B. Magnetic flux
C. Magnetic field strength
D. Coercivity
7. The device used to measure the magnetic field strength is
A. Voltmeter
B. Ammeter
C. Magnetometer
D. Galvanometer
8. The magnetic field inside a long, straight solenoid carrying current is
A. Zero
B. Non-uniform
C. Uniform
D. Depends on the material of the solenoid
9. The force experienced by a charged particle moving in a magnetic field is maximum when the angle between velocity and magnetic field is
A. 0°
B. 45°
C. 90°
D. 180°
10. The magnetic field at the center of a circular loop carrying current is
A. Directly proportional to the radius of the loop
B. Inversely proportional to the radius of the loop
C. Independent of the radius of the loop
D. Zero
11. A current-carrying conductor placed in a magnetic field experiences a force. This phenomenon is utilized in
A. Electric generators
B. Electric motors
C. Transformers
D. Capacitors
12. The phenomenon of electromagnetic induction was discovered by
A. Oersted
B. Faraday
C. Ampere
D. Maxwell
13. Lenz's Law is a consequence of the law of conservation of
A. Energy
B. Charge
C. Momentum
D. Mass
14. The torque τ experienced by a magnetic dipole of moment M in a uniform magnetic field B is given by
A. τ = M × B
B. τ = M + B
C. τ = M/B
D. τ = MB
15. The magnetic susceptibility χ of a diamagnetic material is
A. Positive and small
B. Negative and small
C. Positive and large
D. Negative and large
16. The direction of induced current in a closed loop is given by
A. Faraday's Law
B. Lenz's Law
C. Ampere's Law
D. Biot-Savart Law
17. The magnetic field due to a current-carrying infinite straight wire at a perpendicular distance r is proportional to
A. r
B. 1/r
C. r²
D. 1/r²
18. The force between two parallel current-carrying conductors is used to define
A. Ampere
B. Volt
C. Ohm
D. Coulomb
19. A moving coil galvanometer can be converted into an ammeter by connecting
A. A high resistance in series
B. A low resistance in series
C. A high resistance in parallel
D. A low resistance in parallel
20. The Earth's magnetic field is approximately
A. 1 Tesla
B. 1 Gauss
C. 0.5 Tesla
D. 0.5 Gauss
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