Electromagnetic Effects

Electromagnetic Effects

10th - 12th Grade

16 Qs

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Electromagnetic Effects

Electromagnetic Effects

Assessment

Quiz

Physics

10th - 12th Grade

Medium

Created by

SITI MEILANI

Used 40+ times

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16 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

A strong electromagnet is used to attract pins.

What happens when the current in the coil is halved?

No pins are attracted.

Some pins are attracted, but not as many.

The same number of pins is attracted.

More pins are attracted.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The diagram shows a transformer.

The input voltage is 240 V.

What is the output voltage?

6.0 V

12 V

20 V

40 V

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A coil carries a current in a magnetic field. The coil experiences a turning effect.

Which device uses this effect?

a d.c. motor

an electromagnet

a relay

a transformer

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

A magnet is suspended from a spring so that it can move freely inside a stationary coil. The coil is

connected to a sensitive centre-zero galvanometer.


The magnet repeatedly moves slowly up and down.

What does the galvanometer show?

a constantly changing reading

a steady reading to the left

a steady reading to the right

a steady reading of zero

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

A transformer has 50 turns on its primary coil and 100 turns on its secondary coil. An alternating

voltage of 25.0 V is connected across the primary coil.

What is the voltage across the secondary coil?

12.5 V

50.0 V

100 V

200 V

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is an advantage of transmitting electricity at a high voltage?

It is faster.

It is safer.

Less energy is wasted.

Less equipment is needed.

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

An e.m.f. is induced across a wire when it moves through the magnetic field between the poles of

a magnet.

Which electrical device operates because of this effect?

a battery

a cathode-ray tube

a generator

a motor

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