Electrostatics

Question 1

Neutral charge means

Answer 1

Equal number of electrons and protons

Question 2

Positively charged object are electron _______

Answer 2

Deficient

Question 3

Negatively charged object have an ______ of electrons

Answer 3

Excess

Question 4

How can objects (insulators) be charged by contact (or rubbing)? - Tribo-electric charging

Answer 4

If the object is an insulator it can store charge, and builds up static electricity. Discharge of the charge occurs with a slight shock.

Question 5

SI unit for electric charge

Answer 5

Coulomb (C)

Question 6

Equation for calculating charge (of two balls)

Answer 6

Q = (Q1 +Q2) /2

Add the two charges of the ball together. Then divide that answer by 2.

Question 7

Like charges ____

Answer 7

Repel

Question 8

Unlike charges ____

Answer 8

Attract

Question 9

How can charged objects attract uncharged insulators because of the polarisation of molecules inside insulators?

Answer 9

The net positive or negative charge of the charged object causes a shift in the electrons of the uncharged object and creates two poles. Attraction between the objects can then occur.

Question 10

Equation for calculating charge quantization

Answer 10

Q = ne

Question 11

Charge of an electron (elementary charge)

Answer 11

-1.6 x 10^-19 C

Question 12

Charge of an proton

Answer 12

+1.6 x 10^-19 C