ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

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

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

Ohm established a relation between

Question # 2

The fractional change in resistance per kelvin is known as

Question # 3

The SI unit of capacitance is

Question # 4

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 5

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

Question # 6

The unit of conductance is

Question # 7

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 8

The capacitance of a parallel plate capacitor depends upon

Question # 9

The unit of resistivity is

Question # 10

Thermocouple is an arrangement of two different metals

Question # 11

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 12

The SI unit of conductivity is

Question # 13

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

Question # 14

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 15

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 16

Potentiometer is more sensitive than voltmeter, because

Question # 17

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

Question # 18

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 19

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 20

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Question # 21

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

Question # 22

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 23

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

Question # 24

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Question # 25

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 # 26

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 27

The energy stored in a charge capacitor

Question # 28

Resistance of a conductor depends upon

Question # 29

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Question # 30

Ohm's law states that

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
A. Negative
B. Positive
C. Infinite
D. Zero
2 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
3 The concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday
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 ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44
6 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
7 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy
A. Ve
B. V/e
C. e/V
D. 2Ve
8 The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
9 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
10 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law

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