# NCERT Science Class 10 Chapter 13 Magnetic Effects of Electric Current CBSE Board Sample Problems Multiple Choice Question (For CBSE, ICSE, IAS, NET, NRA 2022)

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## Question

At the time of short circuit, the current in the circuit

1. Vary continuously

2. Reduced considerably

3. Increases heavily

4. Does not change

## Question

Magnetic field lines determine

1. The shape of magnetic field

2. Only the direction of magnetic field

3. Only the relative strength of the magnetic field

4. Both the direction and the relative strength of magnetic field

## Question

While applying Fleming՚s right- hand rule the central (middle) finger of right hand indicates

1. The direction of magnetic field

2. The direction of rotation of conductor

3. The direction of current being flown

4. The direction of induced current

## Question

Fuse wire should be prepared from a material having

1. High conductivity and high melting point

2. High conductivity and low melting point

3. Low conductivity and high melting point

4. Low conductivity and low melting point

## Question

At the time of short circuiting of an electrical circuit the current in the circuit

1. Is substantially reduced

2. Abruptly increases

3. Changes continuously

4. Does not change at all

## Question

An electron moves with a speed y along positive direction of x-axis. IF a magnetic field B acts along the positive y-direction, then the force on the electron will act along direction of x-axis. IF a magnetic field B acts along the positive y-direction, then the force on the electron will

1. X-axis

2. Y-axis

3. -ve z-direction

4. + ve z-direction

## Question

The direction of magnetic field developed around a current-carrying conductor can be easily found by the use of

1. Right hand thumb rule

2. Left hand thumb Rule

3. Fleming՚s left-hand rule

4. Fleminci՚s right-hand rule

## Question

The strength of magnetic field due to a solenoid depends on the

1. Number of turns

2. Current through it

3. Material of core

4. All of these

## Question

The electric current that reverses its direction after a fix interval of time, is called

1. Alternating current

2. Electromagnetic current

3. Direct current

4. Induced current

## Question

In each of the following questions, a statement of Assertion is given by the corresponding of

Reason. Of the statements, marks the correct answer as

Assertion: Iron filings arrange themselves in definite pattern when sprinkled around a bar magnet.

Reason: Definite pattern when a sprinkled around a bar magnet of iron filings, due magnetic effect around a bar magnet.

1. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

2. If both Assertion and Reason are true and Reason is not the correct explanation of Assertion.

3. If Assertion is true, but Reason is false.

4. If Assertion is false but Reason is true.

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