# Magnetism Quiz for fun and Quiz Competition Practice 2

Magnetism Quiz here,

## Results

### #5. In which kind of material, an applied magnetic field induces a magnetic field in the opposite direction in them?

Explanation is given below

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## Magnetism Quiz Explanations

1. Nikola Tesla invented the first ever alternating current motor.

2. Solenoid was invented by Andres-Marie Ampere.

3. After being released, the bar magnetic will move through the copper pipe where induced magnetic field will be created, leading to induced current. But the force on the bar magnet will be constant as F = ILB and all the quantities are constant here.

F = mdv/dt

dv/dt = 0

Hence velocity will be constant.

(Anyone who thinks this isn’t the right explanation can say so in the comment section, also revealing her or his own explanation for the answer)

4. oersted is the CGS unit of magnetic field strength.

1 oersted = 1 maxwell per dyne

5. In diamagnetic materials, the induced magnetic field is in opposite direction to the applied magnetic field. Diamagnetic materials are repelled by a magnet.

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## Magnetic Quiz and Magnetic quiz answers

1. Which physicist discovered the first alternating current (AC) motor?

a. Thomas Alva Edison

b. Nikola Tesla ()

d. George Simon Ohm

2. Who invented the solenoid?

a. Andre-Marie Ampere ()

b. Joseph Henry

c. Nikola Tesla

d. James Clerk Maxwell

3. A bar magnet is released from rest along the axis of a very long, vertical copper tube. After some time, the magnet ________.

a. will stop in the tube

b. will move with almost constant speed ()

c. will oscillate

d. will move with an acceleration g

4. Which of the following is a unit of magnetic field strength?

a. henry

b. maxwell

c. oersted ()

d. ampere. metre

5. In which kind of material, an applied magnetic field induces a magnetic field in the opposite direction in them?

a. Diamagnetic ()

b. Ferromagnetic

c. Paramagnetic d. None of the above