Free Printable Topic 4 (Sem 2) :Magnetism

1.

Where is the strongest attraction force of the magnet?

a)

at the poles

b)

in the middle

c)

above the magnet

d)

below the magnet

2.

What does the following represent?

⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗

a)

Multiplied by a billion

b)

A piece of modern art

c)

Uniform magnetic field directed into the screen away from you

d)

Uniform magnetic field directed out of your screen at you

3.

The SI unit of magnetic field is

a)

weber

b)

gauss

c)

tesla

d)

farad

4.

What does the following represent?
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙

a)

A crowd with binoculars

b)

A bunch of coaxial cables

c)

Uniform magnetic field directed into the screen away from you

d)

Uniform magnetic field directed out of your screen at you

5.

Find the direction of the magnetic force.

a)

Into the screen

b)

Out of the screen

c)

Right

d)

Left

6.

Find the direction of the magnetic force.

a)

Down

b)

Into the screen

c)

Out of the screen

d)

Up

7.

How is the direction of the force on a current-carrying wire related to the direction of the magnetic field?

a)

It is equal and opposite

b)

It is equal and parallel

c)

It is always perpendicular to the magnetic field

d)

It is always opposite to the magnetic field

8.

A wire connected to a circuit and coiled into many spiral loops is known as a _____________.

a)

Induced magnet

b)

solenoid

c)

magnetic moment

d)

forced electric field

9.

What does the direction of the pointing fingers mean in this picture? (right hand rule first version)

a)

the direction of the voltage

b)

the rotation of the wire

c)

the direction of the magnetic field

d)

the direction of the current

10.

Name one factor that does not affect the size of a force in on a current-carrying conductor placed in a magnetic field?

a)

Gravity

b)

Magnetic flux density/size of magnetic field

c)

Size of the current

d)

Length of the conductor

11.

No force acts on a current carrying conductor when it is placed-

a)

Perpendicular to the magnetic field

b)

Parallel to the magnetic field

c)

Far away from the magnetic field

d)

Inside a magnetic field

12.

When will a current carrying conductor placed in a magnetic field experience a zero force ?

a)

when placed parallel to magnetic field

b)

when placed perpendicular to magnetic field

c)

when placed aligned with the magnetic field

d)

when placed at an angle of 60⁰

13.

What is the direction of force for two parallel wires carrying current in the same direction

a)

Attract each other

b)

Repel each other

c)

Cancel their effect

d)

No effect on each other

14.

What is the equation of force for a charge moving in a uniform magnetic field?

a)

$F\ =\ BIl\ \sin\ \theta$

b)

$F\ =\ qvB\ \sin\ \theta$

c)

$F\ =\ \frac{mv^2}{r}$

d)

$F\ =\ \frac{\mu_0I_1I_2}{2\pi d}$

15.

What is the equation of force on a current-carrying conductor in a uniform magnetic field?

a)

$F\ =\ BIl\ \sin\ \theta$

b)

$F\ =\ qvB\ \sin\ \theta$

c)

$F\ =\ \frac{mv^2}{r}$

d)

$F\ =\ \frac{\mu_0I_1I_2}{2\pi d}$

16.

What is the equation of force between two parallel current-carrying conductors

a)

$F\ =\ BIl\ \sin\ \theta$

b)

$F\ =\ qvB\ \sin\ \theta$

c)

$F\ =\ \frac{mv^2}{r}$

d)

$F\ =\ \frac{\mu_0I_1I_2}{2\pi d}$

17.

Which of the following statement is NOT TRUE about the magnetic field lines?

a)

Magnetic field lines are imaginary lines that cannot be directly observed

b)

Magnetic field lines continue inside a magnet

c)

Magnetic field lines always point out from the south pole towards the north pole of a magnet

d)

The number of lines per unit area is proportional to the strength of the magnetic field

18.

The shape of magnetic field around a long straight current carrying wire is

a)

Elliptical

b)

Square

c)

Rectangular

d)

Circular

19.

A proton of mass m and charge e is accelerated by a potential difference V. The proton is then deflected by a magnetic field B which is perpendicular to the motion of the proton. What is the radius of the trajectory of the proton

a)

$\frac{mv}{eB}$

b)

$\frac{B}{m}\sqrt{2eV}$

c)

$\frac{qv}{mB}$

d)

$\frac{B}{e}\sqrt{2mV}$

20.

A current carrying wire lies between the poles of

two magnets, as shown. What is the direction of the force on the wire?

a)

Into the plane of the paper

b)

Out of the plane of the paper

c)

Towards the N-pole

d)

To the right

21.

What is the speed of a charged particle moving in magnetic and electric field?

a)

$v\ =\frac{x}{t}$

b)

$v\ =\ \frac{E}{B}$

c)

$v\ =\frac{B}{E}$

d)

$v\ =\ \frac{qBr}{m}$

22.

In a bainbridge mass spectrometer, a larger mass would result in

a)

A bigger radius

b)

A smaller radius

c)

Radius is not affected by the mass

d)

None of the above

23.

Two long, parallel wires each carry the same

current 𝐼 in the same direction. What is the total

magnetic field at the point 𝑃 midway between the

wires?

a)

Zero

b)

Directed into the page

c)

Directed out of the page

d)

Directed to the left

24.

Diagram shows a plotting compass placed on a cardboard near the current carrying conductor. Which compass shows the correct direction of the magnetic field?

a)

A

b)

B

c)

C

d)

D

25.

Diagram shows a current – carrying conductor in magnetic field. What is the direction of the force that acts on the conductor ?

a)

A

b)

B

c)

C

d)

D

Topic 4 (Sem 2) :Magnetism

Total questions: 25

Worksheet time: 16mins

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