Electric Circuits - Study Notes

The process involved in charging by rubbing or friction is known as:

• Conduction

• Induction

• Friction

• Radiation

Rubbing an ebonite rod with fur results in:

• The rod becoming positively charged

• The rod becoming negatively charged

• No change in charge

• The rod becoming neutral

What is the tendency of a material to attract and hold onto electrons called?

• Electronegativity

• Conductivity

• Magnetism

• Ionization

The Law of Conservation of Charge states that:

• charge can neither be created nor destroyed, only transferred.

• charge can be created and destroyed.

• charge is always positive.

• charge is always negative.

The purpose of an electroscope is to:

• measure temperature

• detect electric charge

• measure pressure

• detect sound

The components of an electroscope are:

• a) Metal rod, metal disc, and metal leaves

• b) Glass tube, rubber stopper, and metal needle

• c) Plastic case, copper wire, and LED light

• d) Wooden base, iron nail, and string

An electroscope can be charged by:

• contact with a charged object

• induction using a charged object

• both contact and induction

• none of the above

What happens when a charged object touches a neutral conductor?

• The neutral conductor remains unchanged.

• The neutral conductor becomes charged.

• The charged object loses its charge.

• The charged object gains more charge.

The mechanism of charging by contact (conduction) is:

• Transfer of electrons from one object to another through direct contact

• Transfer of electrons through a vacuum

• Transfer of protons from one object to another through direct contact

• Transfer of neutrons from one object to another through direct contact

What is the result when a neutral object is charged by contact?

• It becomes positively charged

• It becomes negatively charged

• It remains neutral

• It gains electrons