In a Van de Graaff Generator the inner sphere has higher ________
| In a Van de Graaff Generator the inner sphere has higher _____________ than the outer sphere.
A. potential
B. charge
C. capacitance
D. current
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
CONCEPT:
Van de Graaff Generator:
- It is a machine that can build up high voltages of the order of a few million volts.
- The resulting large electric fields are used to accelerate charged particles (electrons, protons, ions) to high energies needed for experiments to probe the small scale structure of matter.
The following principles are involved in the device.
- Charge on a conductor always move and stay on the outer surface.
- Pointed Corners conduct charges very effectively (corona discharge).
EXPLANATION:
- The Van de Graaff generator is an electrostatic generator, which is used for creating very high electric potentials at low current levels.
- It has a large conducting shell (of a few meters diameter) with a uniformly distributed charge over it.
- A small sphere is placed inside the conducting shell and has less charge than the shell. But the potential at the inner sphere will always be high.
- Thus, the small charge flows from high potential to low potential on the conducting shell, when connected with wire and thus keeps on building the potential on the outer shell.
- Hence option 1 is correct among all
