Subject: Physics (Electrostatics) Class: 8th Total Marks: 15
1) A positive electric charge:
(a) Attracts another positive charge (b) Repels another positive charge
(c) Attracts a neutral charge (d) Repels a neutral charge
2) An object gains excess negative charge after being rubbed against another object, which is:
(a) neutral (b) negatively charged (c) positively charged (d) either, a, b or c
3) When
you rub a plastic rod against your hair several times and put it near some bits
of paper, the pieces of paper are attracted to it. What does this
observation indicate?
(a) rod and paper are oppositely charged (b)
rod acquires a positive charge
(c)
the rod and the paper have the same charges (d) the rod acquires a negative charge
4) In SI the unit of charge is:
(a) Joule (b) Volt (c) Coulomb (d) Watt
5) Positive charge in an electric field always tends to move:
(a) Does not move (b)From lower to higher potential (c) From higher to lower potential (d) All of these
6) Static
electricity can be generated by:
(a)
lubrication (b)
friction (c) motion (d) smaller the
objects
7) Positive charge can be produced by:
(a) combing in hair (b) rubbing glass rod on silk
(c) by rubbing ebonite rod on wool (d) by rubbing glass rod wool
8) In
electrostatic all charges are in:
(a) the same direction (b) opposite
direction (c) motion (d) fixed
state
9) The
substance in which electric current flows easily is called:
(a) transistor (b)
semi-conductor (c) insulator (d) conductor
10)
Study of charges at rest is
called:
(a)
acoustics (b) electrostatics (c) electronics (d) electricity
11)
Unlike charges always:
(a) Attract each other (b) Repel each other (c)
Produce charge (d) Do not affect each other
12)
Which device is used to store
charge?
(a) resistor (b)
capacitor (c) dielectric (d) fuse
13)
Application of electrostatic is:
(a) Car
painting (b) Photocopying (c) Extracting of dust (d) All of these
14)
The presence of fish by the other
fish can be detected by
(a) Magnetic field (b) Electric field (c) Gravitational field (d) All of above
15)
The substances which do not have
free electrons are called:
(a) Insulators (b) Conductors (c) Semiconductors (d) None of these
