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

Physicist George Simon ohm was a

Question # 2

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

Question # 3

One coulomb of charge is created by

Question # 4

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 5

The electric field will be uniform

Question # 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

Question # 7

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 8

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

Question # 9

The charge per unit time through any cross-section of a conductor is called

Question # 10

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 11

The thermistors are usually made of

Question # 12

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 13

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

Question # 14

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
2 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
3 Thermocouple is an arrangement of two different metals
A. To convert heat energy in to electrical energy
B. To produce more heat
C. To convert heat energy into chemical energy
D. To convert electric energy in to heat energy
4 The resistance of an incandescent lamp is
A. Smaller when switched on
B. Greater when switched off
C. The same whether it is switch off or switch on
D. Greater when switched on
5 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
6 A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
A. Electric potential at the surface of the cube is zero
B. Electric potential within the cube is zero
C. Electric filed is normal to the surface of the cube
D. Electric filed varies within the cube
7 Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
A. 0.52 A
B. 1 mA
C. 0.7 mA
D. 1.4 A
8 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
9 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
10 In bringing an electron towards another electron, electrostatic potential energy of system
A. Decreases
B. Increases
C. Remains uncharged
D. Becomes zero

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