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

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

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

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 4

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Question # 5

The energy stored in a charge capacitor

Question # 6

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 7

The liquid which conduct current is known as

Question # 8

Battery is charged in motor cars, which is based on

Question # 9

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 10

The current through a metallic conductor is due to the motion of

Question # 11

One coulomb of charge is created by

Question # 12

The electric field due to an infinite long thin wire at a distance R varies as

Question # 13

The value of electrical constant of proportionality k is

Question # 14

Solar cell converts sunlight directly into

Question # 15

The relation V = IR represents

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Equal charges are given to two spheres of different radii. The potential will
A. Be more on the smaller sphere
B. Be more on the bigger sphere
C. Be equal on both the sphere
D. Depend on the nature of the material of the sphere
2 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
3 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
4 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
5 The electrode connected with the positive terminal of the current source is called
A. cathode
B. anode
C. electrolyte
D. position
6 A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be
A. 1840 KeV
B. 1/1840 KeV
C. 1 KeV
D. 920 KeV
7 In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A
8 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
9 The charge carriers in electrolyte are positive and negative
A. protons
B. electrons
C. ions
D. none of these
10 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
A. -10 N
B. +10 N
C. +20 N
D. -20 N

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