Physics Check In 1/22-1/26

What is the principle of electrostatic induction used in the Van de Graaff generator?

• Generating a magnetic field to induce electricity

• Using friction to create static electricity

• Inducing a charge in a nearby object without direct contact

• Transferring charge through a direct current

How does the Van de Graaff generator initially generate charge?

• By chemical reaction

• By nuclear fission

• By contact with a charged object

• By the triboelectric effect

What is the role of the belt in a Van de Graaff generator?

• To provide structural support to the sphere

• To insulate the generator from the ground

• To transport charge to the high voltage terminal

• To reduce the charge leakage from the sphere

During the charging process in the Van de Graaff generator, where does the charge accumulate?

• On the belt throughout its length

• On the lower roller

• On the outer surface of the spherical dome

• Evenly distributed inside the spherical dome

What happens when the Van de Graaff generator discharges?

• It emits visible light

• It creates a magnetic field

• It produces a continuous current

• It releases a spark or electrical discharge

Which material is commonly used for the belt in a Van de Graaff generator to ensure efficient charge transport?

• Copper

• Rubber

• Aluminum

• Silk

What is the purpose of the comb or brush structure near the top of the Van de Graaff generator?

• To clean the belt

• To ionize surrounding air

• To deposit charge onto the belt

• To remove charge from the belt and transfer it to the sphere

Why is it important for the sphere of the Van de Graaff generator to be smooth and spherical?

• To allow for easy cleaning

• To minimize charge leakage through sharp points

• To make it visually appealing

• To increase the belt's lifespan

What is the main reason for using a high voltage terminal in the form of a large sphere in the Van de Graaff generator?

• To store a large amount of charge

• To create a uniform electric field inside the sphere

• To prevent corona discharge

• To facilitate easy attachment of experimental apparatus

In a Van de Graaff generator, what ensures that the charge is transferred from the belt to the sphere at high efficiency?

• The belt moving at high speed

• The use of a metal comb with sharp points

• The humidity level in the room

• The grounding of the lower roller