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

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Question # 2

Capacitance of two or more capacitors

Question # 3

The concept of field theory was put forward by

Question # 4

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 5

Which one of the following is the unit of electric field intensity

Question # 6

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

Question # 7

The conductivity of a superconductor is

Question # 8

The dot product of electric field intensity E and vector area A is called

Question # 9

The electric field will be uniform

Question # 10

Thermocouple is an arrangement of two different metals

Question # 11

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 12

One electron volt is equal to

Question # 13

Heating effect caused by an electric circuit is written

Question # 14

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

Question # 15

The SI unit of current is

Question # 16

The electric lines of force are

Question # 17

Ohm established a relation between

Question # 18

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

Question # 19

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 20

The resistance of an incandescent lamp is

Question # 21

Cause of heat production in a current carrying conductor is

Question # 22

The energy stored in a charge capacitor

Question # 23

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

Question # 24

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 25

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 26

The SI unit of electric flux is

Question # 27

One coulomb per second is equal to

Question # 28

Surface density of charge is defined as

Question # 29

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 # 30

The electric flux from a closed surface

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The energy stored in a charge capacitor
A. 1/2CV2
B. 1/2C2V
C. 1/2C/V2
D. None of these
2 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
3 One joule is equal to
A. 1.6 x 1019eV
B. 6.25 x 1018eV
C. 1.6 x 1818eV
D. 6.25 x 1019eV
4 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
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)
A. 2
B. 1
C. 0.5
D. 1.5
6 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A. Increases
B. Decreases
C. Remain unchanged
D. Becomes infinite
7 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
8 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
9 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
10 The graphical representation of ohm's law is
A. hyperbola
B. straight line
C. ellipse
D. parabola

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