Chapter 9 The Electric field ,Multiple choice questions

The Coulomb force between a proton and a neutron is .......... .

• attractive

• repulsive

• zero

The SI unit of electric field intensity is.......... .

• newton metre

• joule per coulomb

• newton per coulomb

............ rods are used as lighting conductors.

• Plastic

• Iron

• Copper

............. are long range forces.

• Gravitational and electromagnetic force

• Gravitational force and nuclear force

• Nuclear and electromagnetic force

............ force are the weakest of four fundamental forces.

• Gravitational

• Electromagnetic

• Nuclear

........... law is also called an inverse square law

• Coulomb

• Joule

• Stephan-Boltzmann

Coulomb force between two charges is .......... .

• always attractive

• always repulsive

• either attractive or repulsive

Gravitational force between two masses is .......... .

• always attractive

• always repulsive

• either attractive or repulsive

An electric field is a region where the........... act.

• gravitational forces

• electrical forces

• magnetic force

The electric field is ........ everywhere inside a chargeed conducting object.

• very large

• very small

• zero