Force Fields

A positive electric charge is formed at the rod that made of ……………… when we rub it with a piece of silk

• Glass
• Ebonite
• Copper
• Wood

A rod made of iron is charged with a static charge when rubbed and provided with hand made of …………

• aluminum
• copper
• silver
• Plastic

When we rub a rod of ebonite with silk ………………… transferred from silk to ebonite

• Protons
• Electrons
• Neutrons
• Atoms

To protect constructions and buildings from lightning strikes

• Coulomb meter
• Electroscope
• Lightning rod
• Volta meter

The electrostatic series is the arrangement of some materials according to the ease of losing ………………… from them.

• Protons
• Electrons
• Neutrons
• Molecules

The weak electric charge is measured by………………… device

• a) Coulomb meter
• b) Lightning rod
• c) Electroscope
• d) Voltmeter

The ………………… device is used to indicate the electrical state of the body

• Hoffman voltameter
• Electroscope
• Lightning rod
• Voltameter

to paint metals using electrostatic painting the paint spray is charged with ……

• positive charge
• negative charge
• neutral charge
• natural charge

Metal chains are hanged from fuel transport vehicles and touches the ground to discharge static elecricity formed due to …..

• friction between vehicles tires and road
• friction between fuel and tank
• friction between vehicles and air
• friction between vehicles and driver

Electric power lines start from the………………… charge and end at the ……………… charge

• positive / negative
• negative / positive
• negative /neutral
• negative /negative