ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become

Question # 2

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

Question # 3

Which one of the following causes production of heat when current is set up in a wire?

Question # 4

106electrons are moving through a wire per second, the current developed is

Question # 5

Coulomb force, when any material medium is placed between two charges

Question # 6

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Question # 7

One joule is equal to

Question # 8

The minimum charge on any object can not be less than

Question # 9

The SI unit of permitivity is

Question # 10

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

Question # 11

The SI unit of conductivity is

Question # 12

Capacitance of two or more capacitors

Question # 13

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 14

Equal charges are given to two spheres of different radii. The potential will

Question # 15

The resistance of a conductor does not depend on its

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1
2 The earth's potential is taken as
A. Negative
B. Positive
C. Zero
D. Infinite
3 For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
4 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
5 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
6 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
7 Surface density of charge is defined as
A. Charge per unit volume
B. Charge per unit length
C. Charge per unit area
D. Charge per unit mass
8 Current provided by a battery is maximum when
A. Internal resistance equal to external resistance
B. Internal resistance is greater than external resistance
C. Internal resistance is less then external resistance
D. None of these
9 If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us
A. parabola
B. straight line
C. hyper bola
D. ellipse
10 The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of
A. negative charges
B. positive charges
C. protons
D. electrons

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