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 capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 2

Physicist George Simon ohm was a

Question # 3

The energy stored in a charge capacitor

Question # 4

The SI unit of current is

Question # 5

The electric flux from a closed surface

Question # 6

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 7

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

Question # 8

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 # 9

The thermistors are usually made of

Question # 10

Thermocouple is an arrangement of two different metals

Question # 11

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 # 12

The ohm's is defined as

Question # 13

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

Question # 14

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

Question # 15

The electric field due to an infinite long thin wire at a distance R varies as

Question # 16

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 17

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 18

Ohm's law states that

Question # 19

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

Question # 20

The resistivity of a substance depends upon the

Question # 21

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

Question # 22

Capacitance of two or more capacitors

Question # 23

The charge carriers in electrolyte are positive and negative

Question # 24

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

Question # 25

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

Question # 26

The minimum charge on any object can not be less than

Question # 27

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 # 28

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

Question # 29

The SI unit of conductivity is

Question # 30

In a voltmeter the conduction takes place due to

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 One coulomb per second is equal to
A. One volt
B. One ampere
C. One hom
D. One henry
2 The resistance of the given conductor can be increased by
A. Increasing the area
B. Changing resistivity
C. Decreasing the length
D. None of the above because change does not matter because in any case the volume remains the same
3 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
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
4 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
5 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
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
6 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
A. -10 N
B. +10 N
C. +20 N
D. -20 N
7 A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
A. 64 W
B. 80 W
C. 100 W
D. 125 W
8 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
9 Resistance of a conductor depends upon
A. the quantity of current passing through it
B. the voltage applied between its end
C. its dimensions, physical state and nature of its material
D. all of the above
10 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged

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    fun day

    02 Mar 2023

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    18 Jun 2019

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    27 Apr 2019

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    15 Feb 2019

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