Quiz 17 – APS Physics

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Passing percentage = 60%

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Magnetism

1 / 10

What happens if a rod of soft iron is introduced inside the core of solenoid?

magnetic field strength will decrease

short circuiting of solenoid

magnetic field strength will increase

solenoid will explode

2 / 10

The magnetic field lines due to a straight wire carrying a current are

straight

elliptical

circular

parabolic

3 / 10

A current through a horizontal power line flows in east to west direction. The direction of the magnetic field at a point directly below it is from

South to North

West to East

North to West

North to South

4 / 10

The direction of the force on a current carrying wire placed in a magnetic field depends on

the direction of the current but not on the direction of field

the direction of the field but not on the direction of the current

the direction of the current as well as the direction of the field

neither the direction of the current nor the direction of the field

5 / 10

Which one of the following is not true about solenoid?

Magnetic field inside the solenoid is non-uniform

Solenoid is a coil of many circular turns of insulated copper wire wrapped closely in the shape of a cylinder

A iron rod placed inside a current carrying solenoid coil behaves like a magnet

The ends of the solenoid behaves like pole of a bar magnet

6 / 10

The region of a current carrying solenoid where field lines are parallel straight lines.

region above and below the solenoid

everywhere inside and outside the solenoid

inside the solenoid

Just outside the poles of the solenoid

7 / 10

Which one of the following is not a correct way of increasing the magnetic field of a solenoid?

by increasing current in the solenoid

by placing a soft iron core inside the solenoid

by using alternating current instead of direct current

by increasing the number of turns of the solenoid

8 / 10

The magnetic lines of force inside a bar magnet

do not exist

are from south pole to the north pole of the magnet

are from north pole to the south pole of the magnet

are perpendicular to the length of the magnet

9 / 10

Which one of the following is a correct statement ?

We can connect a lot of appliances on a single socket

Electric fuse is always connected to the neutral wire

A wire with a green insulation is usually the live wire of an electric supply

Short circuit can happen in a worn-out wire if live wire comes in direct contact with the neutral wire

10 / 10

Which of the following is not a factor on which magnetic field at the center of a circular coil carrying current depends on ?

length of the wire

number of turns of circular coil

electric current

radius of the coil

The average score is 70%

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