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Worksheets

immersion

Total questions: 15

Worksheet time: 30mins

Name
Class
Date
1.

The phenomenon of inducing a voltage by changing the magnetic field around a conductor is called __________.

a)

electromagnetic induction

b)

Faraday’s induction

c)

generated voltage

d)

transformer induction

2.

By accelerating the magnet inside the coil, the current in it ________

a)

increases

b)

decreases

c)

remains constant

d)

reverses

3.

What is the SI unit for EMF?

a)

Farad

b)

Ohm

c)

EMF

d)

Volt

4.

EMF can be induced in a circuit EXCEPT:

a)

changing magnetic flux density

b)

changing the area of the circuit

c)

changing the angle

d)

changing the polarity

5.

As per Faraday's laws of electromagnetic induction, increasing the number of loops will______

a)

strengthen the induced current

b)

increase induced voltage

c)

strengthen the induced voltage

d)

decrease the induced current

6.

What is the SI unit of Magnetic Flux?

a)

Henry

b)

Weber

c)

W/s

d)

Tesla

7.

At the South Pole, the Earth’s magnetic field is directed upwards. If a plane is flying over the South Pole, which wing will have the higher potential?

a)

The left wing

b)

The right wing

c)

Both wings have the same potential

d)

None

8.

The Law that states that the direction of an induced current is such that its own magnetic field opposes the original change in magnetic flux that induced the current.

a)

Law of conservation of energy

b)

Faraday’s Law

c)

Lenz’s Law

d)

all of the above

9.

The positive and negative terminals of direct current have

a)

no polarity.

b)

fixed polarity.

c)

variable polarity.

d)

negative polarity always

10.

Which circuit contain both capacitor and an inductor?

a)

RC Circuit

b)

RL Circuit

c)

LC Circuit

d)

RT Circuit

11.

Which is a coil of conductor attached to a circuit for the purpose of inducing EMF?

a)

Transformer

b)

Diode

c)

Transistor

d)

Inductor

12.

Which is used to adjust alternating current voltages and currents in circuits?

a)

Transformer

b)

Diode

c)

Transistor

d)

Inductor

13.

Lenz’s law is named after the Russian scientist ______

a)

Henrich Lenz

b)

Heinrich Lens

c)

Heinrich Lenz

d)

Henrich Lens

14.

Who invented the transformer?

a)

Nikolah Tesla

b)

Nikolai Tesla

c)

Nikola Teslah

d)

Nikola Tesla

15.

In a transformer, if the secondary coil has more turns than the primary, then the alternating voltage produced is _____

a)

increased

b)

decreased

c)

minimum

d)

stable