Van de Graaff Generator

Q. An efficient Van de Graff generator has a rounded terminal as it:

1. disrupts the electric field around it
2. shields it from the electric field.
3. minimizes the electric field around it.
4. maximizes the electric field around it.

Q. In a Van de Graaff type generator a spherical metal shell is to be a15 × 106 V electrode. The dielectric strength of the gas surroundingthe electrode is 5 × 107 Vm–1. What is the minimum radius of thespherical shell required? (You will learn from this exercise why onecannot build an electrostatic generator using a very small shellwhich requires a small charge to acquire a high potential.)

Q. In a cyclotron, a charged particle(1) Speeds up inside a dee because of magnetic field(2) Gains kinetic energy between the dees because of electric field (3)Undergoes acceleration all time(4) Both (2) and (3)

Q. An efficient Van de Graff generator has a rounded terminal as it:

1. maximizes the electric field around it.
2. disrupts the electric field around it
3. minimizes the electric field around it.
4. shields it from the electric field.

Q. An efficient Van de Graff generator has a rounded terminal as it:

1. disrupts the electric field around it
2. minimizes the electric field around it.
3. maximizes the electric field around it.
4. shields it from the electric field.

Q. Which of the following principles are involved in the design of the Van de Graaf generator?

1. Charging by friction
2. Charging by conduction
3. Charging by induction
4. All of these.

Q. A Van De Graaff generator can be charged to any amount of charge.

1. False
2. True

Q. The device which converts mechanical energy into energy which runs our microwave oven is :

1. Eectric motor
2. Alternator
3. Turbine
4. Electric heater

Q. Which of the following principles are involved in the design of the Van de Graaf generator?

1. Charging by conduction
2. Charging by friction
3. All of these.
4. Charging by induction

Q. In a Van de Graaff electrostatic generator a rubber belt of 0.3 m width travels at a velocity of 20m/s. The belt is given a uniform surface charge at lower roller, so it produces a field of ${10}^{6}V/m$ in its vicinity. Current (in milliamperes) carried by the belt is

Q. A Van De Graaff generator can be charged to any amount of charge.

1. False
2. True

Q. In a Van de Graaff electrostatic generator a rubber belt of 0.3 m width travels at a velocity of 20m/s. The belt is given a uniform surface charge at lower roller, so it produces a field of ${10}^{6}V/m$ in its vicinity. Current (in milliamperes) carried by the belt is

Q.

A Van de graph generator is used

1. to produce charged particle.

2. to accelerate charged particles.

3. to accelerate both charged and uncharged particles.

4. to accelerate uncharged particles.

Q. In a Van de Graaff electrostatic generator a rubber belt of 0.3 m width travels at a velocity of 20m/s. The belt is given a uniform surface charge at lower roller, so it produces a field of ${10}^{6}V/m$ in its vicinity. Current (in milliamperes) carried by the belt is