Magnetic Effect of Electric Current Quiz 6

Question 1

Which of the following statement is true ?

Accepted Answer

all of these

Answer

A magnetic field is characterized by strength and direction.

Answer

The direction of the magnetic field can be determined by using a compass.

Answer

The strength of the magnetic field varies with distance from the bar magnet.

Question 2

Which of the following statements is correct ?

Accepted Answer

Earth&rsquo;s magnetic field is uniform.

Answer

The magnetic field produced by a bar magnet-is non-uniform.

Answer

The magnetic field produced by a bar magnet is uniform.

Answer

Earth&rsquo;s magnetic field is non-uniform.

Question 3

Which of the following statements is, are correct?

Accepted Answer

All of these

Answer

A long wire wound in a closely packed helix is called solenoid.

Answer

The magnetic field lines set up by solenoid resemble those of a bar magnet.

Answer

One end of the solenoid behaves like a north pole and other behaves like a south pole when electric current flows through it.

Question 4

Which of the following statements are true ?

Accepted Answer

All of these

Answer

The direction of the magnetic field lines due to straight current carrying wire can be determined by using right hand rule.

Answer

The direction of the magnetic field lines due to circular current carrying wire can be determined by using right hand rule.

Answer

The direction of the magnetic field lines due to current carrying solenoid can be determined by using right hand rule.

Question 5

Which of the following statements is correct.

Accepted Answer

All of these

Answer

The direction of rotation of motor will be reversed when the direction of the current is reversed.

Answer

The direction of the rotation of motor will be reversed when the direction of the magnetic field is reversed.

Answer

The direction of the rotation of motor will remain unchanged when both current and magnetic field are reversed simultaneously.

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