Magnetism

"Oersted" is the unit of .........

• Electric field

• Magnetic field strength

• Electromagnetic intensity

• Power

Which one of the following is a vector quantity ?

• Electric potential

• Magnetic flux

• Magnetic potential

• Magnetic field

Which one of the following is a wrong statement ?

• Electricity and Magnetism are linked to each other.

• Magnetic field is a quantity that has both magnitude and direction

• Inside the magnet the direction of magnetic field lines is from North pole to South pole.

• In a uniform magnetic filed, the field lines are parallel.

How are the field lines in a uniform magnetic field ?

• Curved equispaced lines

• Curved non-equispaced lines

• Parallel equidistant lines

• Parallel non equispaced lines.

In a domestic electric circuits, the wire with ....... insulation is called live wire.

• Red

• Black

• Green

• Yellow

In domestic electric circuit, the wire with .......... insulation is called neutral wire.

• Red

• Black

• Green

• Yellow

In domestic circuits, the wire with insulation of ........ colour is called earth wire.

• Red

• Black

• Brown

• Green

At the meter board in the house, .......... wire and ........ wire pass into the electricity meter through a main fuse.

• Neutral wire and Live wire

• Live wire and Earth wire

• Neutral wire and Earth wire

• Negative wire and earth wire

In domestic network, the domestic appliances are connected in .............

• Series

• Parallel

• Series Parallel combination

• Parallel series combination

A ....... in a circuit prevents damage to the appliances and the circuit due to over loading or short circuiting.

• Electricity Meter

• Earth plate

• Fuse

• Earth wire