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

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 2

Which of the following does not obey ohm's law?

Question # 3

Resistance of a conductor depends upon

Question # 4

Ohm established a relation between

Question # 5

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 # 6

In bringing an electron towards another electron, electrostatic potential energy of system

Question # 7

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 8

The electric flux from a closed surface

Question # 9

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 10

The electric field will be uniform

Question # 11

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 # 12

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 13

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Question # 14

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 15

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
2 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates
3 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
A. 5μF
B. 20μF
C. 10μF
D. 15μF
4 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
5 Coulomb's force between two point charges depends upon
A. Magnitude of charges
B. Distance between them
C. Medium in which they are located
D. All of the above
6 If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
7 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
8 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
9 A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is
A. Two
B. 1/2
C. Zero
D. 3/2
10 Cause of heat production in a current carrying conductor is
A. Collisions of free electrons with one another
B. High drift speed of free electrons
C. Collisions of free electrons with atoms or ions of conductor
D. High resistance value

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