ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

The minimum charge on any object can not be less than

Question # 2

The charge carriers in gases are

Question # 3

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

Question # 4

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

Question # 5

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 6

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

Question # 7

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 8

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 9

The electric flux from a closed surface

Question # 10

Electric generators which convert mechanical energy into

Question # 11

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

Question # 12

Cause of heat production in a current carrying conductor is

Question # 13

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

Question # 18

The liquid which conduct current is known as

Question # 19

The SI unit of capacitance is

Question # 20

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

Question # 21

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

Question # 22

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 23

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

Question # 24

Electric flux is defined by the relation

Question # 25

Resistor is a device which convert electric energy to

Question # 26

The ohm's is defined as

Question # 27

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

Question # 28

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

Question # 29

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

Question # 30

The electric field will be uniform

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The charge per unit time through any cross-section of a conductor is called
A. capacitance
B. electric power
C. current
D. potential difference
2 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
3 The resistivity of a substance depends upon the
A. length
B. mass
C. area
D. temperature
4 Ohm's law states that
A. The current through a resistor is directly proportional to the applied voltage
B. The voltage across a resistor is directly proportional to the current passing through it
C. Resistance is the constant of proportionality between the voltage and current
D. all of these
5 A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is
A. 10μF
B. 20μF
C. 30μF
D. 15μF
6 The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is
A. 4/5Ω
B. 5/4Ω
C. 20Ω
D. 0.05 Ω
7 A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
8 When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to
A. One joule
B. One erg
C. One electron volt
D. None of these
9 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
10 One coulomb of charge is created by
A. 10 electrons
B. 1.6 x 10-19electrons
C. 6.25 x 1018electrons
D. 6.25 x 1021electrons

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