Physics - Electrostatics

Question 1

Negatively Charged Objects

Answer 1

Excess of Electrons

Question 2

Positively Charged Objects

Answer 2

Deficiency of Electrons

Question 3

Unit of Charge

Answer 3

Coulomb

Question 4

The Charge of an Electron => Qe

Answer 4

1.6 x 10^-19

Question 5

Number of electrons gained/lost=

Answer 5

Q on object/Qe

Question 6

Charging by induction

Answer 6

Negatively charged rod is brought near a neutral sphere. The electrons in the neutral sphere are repelled to the top of the sphere and if it is attached to the ground, by means of a wire, then electrons will move from the negatively charged area of the sphere through the wire and into the ground. After the sphere is disconnected from the ground, it will have lost electrons and will have a positive charge.

Question 7

Electrostatic Forces

Answer 7

These act over distances. Charged objects exert forces on other nearby objects and can attract uncharged and charged objects.

Question 8

Where is charge always contained?

Answer 8

On the surface of the object

Question 9

Charge after Touching=

Answer 9

(Q1+Q2)/2

Question 10

Number of Electrons transferred=

Answer 10

Qtransferred {Qt - Qo}/Qe

Question 11

The Law of Conservation of Charge

Answer 11

When two identical objects touch, electrons move from one object to the other until their charges are the same

Question 12

Coulomb’s Law

Answer 12

The force of attraction or repulsion between two objects is directly proportional to the product of the charges and inversely proportional to the square of the distance between the charges

Question 13

Electrostatic Force=

Answer 13

(kQ1Q2)/r^2