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

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 # 2

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

Question # 3

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 # 4

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

Question # 5

At any point on the right bisector of the line joining two equal and opposite charges

Question # 6

The nature of capacity of electrostatic capacitor depends on

Question # 7

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

Question # 8

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 # 9

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 10

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 # 11

The unit of resistance is

Question # 12

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

Question # 13

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 14

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 15

Electron volt is the unit of.

Question # 16

Magnetic effect at a point caused due to flow a current depend upon the

Question # 17

Electron volt is the unit of

Question # 18

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 # 19

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

Question # 20

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

Question # 21

The liquid which conduct current is known as

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

Electric generators which convert mechanical energy into

Question # 26

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

Question # 27

Electric flux is defined by the relation

Question # 28

In a voltmeter the conduction takes place due to

Question # 29

Coulomb force, when any material medium is placed between two charges

Question # 30

The speed of randomly moving electrons depends upon

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is
A. 10Ω
B. 20Ω
C. 30Ω
D. 40Ω
2 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
3 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)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
4 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
A. one ohm
B. one joule
C. one volt
D. one ampere
5 The SI unit of electric field intensity is
A. CN-1
B. NC-1or Vm-1
C. JC-1
D. AV-1
6 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
7 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
8 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
9 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
10 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

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