(a) electric effects only (b) magnetic effects only (c) both electric and magnetic effects (d) None of these

 Charge is (a) transferable (b) associated with mass (c) conserved (d) All of these

A body is positively charged, it implies that (a) there is only positive charge in the body. (b) there is positive as well as negative charge in the body but the positive charge is more than negative charge (c) there is equal positive and negative charge in the body but the positive charge lies in the outer regions (d) negative charge is displaced from its position

Which of the following is the best insulator? (a) Carbon (b) Paper (c) Graphite (d) Ebonite

If a body is negatively charged, then it has (a) excess of electrons (b) excess of protons (c) deficiency of electrons (d) deficiency of neutrons

ANSWER:a

When a body is charged by induction, then the body (a) becomes neutral (b) does not lose any charge (c) loses whole of the charge on it (d) loses part of the charge on it

ANSWER:b

On charging by conduction, mass of a body may (a) increase (b) decreases (c) increase or decrease (d) None of these

ANSWER:c

If an object possesses an electric charge, it is said to be electrified or … A … When it has no charge, it is said to be … B … Here, A and B refer to (a) charged, neutral (b) neutral, charged (c) discharged, charged (d) active, reactive

ANSWER:a

A positively charged rod is brought near an uncharged conductor. If the rod is then suddenly withdrawn, the charge left on the conductor will be (a) positive (b) negative (c) zero (d) cannot say

ANSWER:c

Two spheres A and B of exactly same mass are given equal positive and negative charges respectively. Their masses after charging (a) remains unaffected (b) mass of A > mass of B (c) mass of A < mass of B (d) Nothing can be said

ANSWER:c

When some charge is transferred to …A… it readily gets distributed over the entire surface of … A… If some charge is put on … B…, it stays at the same place. Here, A and B refer to (a) insulator, conductor (b) conductor, insulator (c) insulator, insulator (d) conductor, conductor

ANSWER:b

Quantisation of charge was experimentally demonstrated by (a) Einstein’s photoelectric effect (b) Frank-Hertz experiment (c) Davisson and Germer experiment (d) Millikan’s oil drop experiment

ANSWER:d

The law, governing the force between electric charges is known as (a) Ampere’s law (b) Ohm’s law (c) Faraday’s law (d) Coulomb’s law

ANSWER:d

The value of electric permittivity of free space is (a) 9 × 10⁹ NC²/m² (b) 8.85 × 10^–12 Nm²/C² sec (c)8.85 × 10^–12 C²/Nm² (d) 9 × 10⁹ C²/Nm²

ANSWER:d

Coulomb’s law is true for (a) atomic distances (= 10^–11 m) (b) nuclear distances (= 10^–15 m) (c) charged as well as uncharged particles (d) all the distances

ANSWER:d

PART 2

To relieve the discomfort of allergy sufferers in homes, we use

1. vacuum cleaner
2. electrostatic air cleaner
3. wind cleaner
4. none of above

ANSWER:2Coulomb’s law is only true for point charges whose sizes are

1. medium
2. very large
3. very small
4. large

ANSWER: 3As per Coulomb’s law, the force of attraction or repulsion between two point charges is directly proportional to the

1. sum of the magnitude of charges
2. square of the distance between them
3. product of the magnitude of charges
4. cube of the distance

ANSWER: 3If F is the force acting on the test charge q_o, the electric field intensity E would be given by

1. E = F – q_o
2. E = F/q_o
3. E = F + q_o
4. E = q_o/F

ANSWER: 2The ability of a capacitor to store charge depends upon

1. area of plates
2. distance between plates
3. type of dielectric used
4. all of above

ANSWER: 4In the combination of capacitors in series, the capacitors are connected

1. parallel
2. side by side
3. up and down
4. none of above

ANSWER: 2The coulomb’s force between the 2 point charges 10µC and 5µC placed at a distance of 150cm is

1. 0.2 N
2. 0.5 N
3. 2 N
4. 10 N

ANSWER: 1 If 5 J of work is required to shift 10 C charge from one place to another then the potential difference is

1. 0.5 V
2. 2 V
3. 5 V
4. 10 V

ANSWER: 1The value of k in coulomb’s law depends upon

1. magnitude of charges
2. distance between charges
3. medium between two charges
4. all of above

ANSWER: 3A device which stores charge is called

1. Resistor
2. Inductor
3. capacitor
4. transistor

ANSWER: 3The resonant circuits that tune radios to particular frequencies are called

1. plate circuits
2. radio circuits
3. filter circuits
4. fiber circuits

ANSWER: 3The property of material due to which it attracts or repels other objects is

1. friction
2. velocity
3. current
4. charge

ANSWER: 4If the medium between two charges is air, then the value of constant k in SI units will be

1. 5 × 10⁹ Nm²C^-2
2. 7 × 10⁹ Nm²C^-2
3. 8 × 10⁹ Nm²C^-2
4. 9 × 10⁹ Nm²C^-2

ANSWER: 41 micro farad (1µF) is equal to

1. 1×10^-9F
2. 1×10^-12F
3. 1×10^-6F
4. 1×10^-10F