Magnetic Field Due to Straight Current Carrying Conductor

Q. The shape of magnetic field lines around a straight current carrying wire is ___.

1. elliptical curves
2. concentric circles
3. parallel lines
4. a grid of parallel and perpendicular lines

Q. Straight current carrying conductors produce magnetic fields around them.

1. concentric, circular
2. parallel
3. intersecting

Q. Which of the following correctly describes the magnetic field near a long straight wire?

1. The field consists of straight lines perpendicular to the wire.
2. The field consists of straight lines parallel to the wire.
3. The field consists of radial lines originating from the wire.
4. The field consists of concentric circles centered on the wire.

Q.

Which of the following correctly describes the magnetic field near a long straight wire?

1. The field consists of straight lines perpendicular to the wire

2. The field consists of straight lines parallel to the wire

3. The field consists of radial lines originating from the wire

4. The field consists of concentric circles centred on the wire

Q.

Which of the following materials is the most suitable for making the core of an electromagnet?

1. Brass

2. Soft iron

3. Aluminium

4. Steel

Q. The magnetic field produced by a solenoid resembles that of a _________.

1. cow magnet
2. horseshoe magnet
3. bar magnet
4. straight conductor

Q. Choose a good core for electromagnet.

1. Steel
2. Copper
3. Soft iron
4. Brass

Q. Which of the following device is responsible for attracting the striker?

1. 
2. 
3. 
4. 

Q. As we move away from current carrying conductor, the spacing between the magnetic field lines:

1. Increases
2. Decreases
3. Remains same
4. Becomes zero

Q. Label the parts of the electric bell given below.

1. Electromagnet
2. Gong
3. Contact screw
4. Striker