Electricity and Magnetism Test

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Electricity and Magnetism Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Alnico is an alloy of

A
Iron, cobalt, nickel

B
Aluminum, cobalt, nickel

C
Magnesium, iron, Sulphur

D
Nickel, magnesium, cobalt

Solution

Alnico is an alloy of aluminium, cobalt & nickel
Question 2
1 / -0

The region around a magnet where its effects can be felt is called

A
North pole

B
South pole

C
Electric field

D
Magnetic field

Solution

The region around magnet where its effects can be felt is called its magnetic field
Question 3
1 / -0

Which of the following statements is not correct?

A
Each magnetic line of force starts from North pole and ends at South pole

B
Two magnetic lines of force intersect each other at North pole

C
Magnetic lines of force are closer when magnetic field is strong

D
Arrows show the direction in which magnetic field is acting

Solution

Two lines of force never intersect each other.
Question 4
1 / -0

Which of the following is not correct about a Solenoid?

A
It looks like a spring

B
Its each turn carries the different current

C
It offers a uniform magnetic field

D
Pole get reversed if direction of current is reversed

Solution

In a solenoid, each turn carries the same amount of current & hence provides uniform magnetic field
Question 5
1 / -0

The strength of an electromagnet depends upon

A
Number of turns of coil per unit length

B
The strength of the current

C
The material forming its core

D
All of these

Solution

The strength of an electromagnet depends upon all of the mentioned factors (1), (2) and (3).
Question 6
1 / -0

When the magnetic flux linked with a circuit changes

A
The voltage remains constant

B
Current is induced in the circuit

C
The current increases gradually

D
All of these

Solution

When the magnetic flux linked with a circuit changes current is induced in the circuit. Moving a magnet near the coil changes the magnetic field at the coil which in turn changes the magnetic flux linked with the coil.
Question 7
1 / -0

Which of the following types of current is given by our mains supply?

A
Direct current

B
Zero current

C
Alternating current

D
All of these

Solution

Our mains supply gives an alternating current because, the motion of the coil keeps charging with every half rotation. AC is safer than DC
Question 8
1 / -0

Which of the following is of the correct order of input voltage that a main transformer receives?

A
110 V

B
220 V

C
132, 00 V

D
132, 000 V

Solution

A mains transformer receives the voltage of the order of 132,000 V. This voltage is then stepped down to 220 V by the transformer and then supplied to the residential areas for residential use.

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Electricity and Magnetism Test - 3

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Electricity and Magnetism Test - 3

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Question 1

Iron, cobalt, nickel

Aluminum, cobalt, nickel

Magnesium, iron, Sulphur

Nickel, magnesium, cobalt

Solution

Question 2

North pole

South pole

Electric field

Magnetic field

Solution

Question 3

Each magnetic line of force starts from North pole and ends at South pole

Two magnetic lines of force intersect each other at North pole

Magnetic lines of force are closer when magnetic field is strong

Arrows show the direction in which magnetic field is acting

Solution

Question 4

It looks like a spring

Its each turn carries the different current

It offers a uniform magnetic field

Pole get reversed if direction of current is reversed

Solution

Question 5

Number of turns of coil per unit length

The strength of the current

The material forming its core

All of these

Solution

Question 6

The voltage remains constant

Current is induced in the circuit

The current increases gradually

All of these

Solution

Question 7

Direct current

Zero current

Alternating current

All of these

Solution

Question 8

110 V

220 V

132, 00 V

132, 000 V

Solution

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