ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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

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ECAT Physics 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

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 3

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

Question # 4

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

Question # 5

The charge carriers in gases are

Question # 6

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 7

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 8

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

Question # 9

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

Question # 10

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 # 11

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

Question # 12

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

Question # 13

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
2 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
3 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
4 The electric intensity outside the two oppositely charged parallel metal plates is
A. Maximum
B. Minimum
C. Zero
D. Infinite
5 The capacitance of a parallel plate capacitor depends upon
A. Area of the plates
B. Separation between the plates
C. Medium between the plates
D. All of the above
6 In a voltmeter the conduction takes place due to
A. Electrons only
B. Holes only
C. Electrons and holes
D. Electrons and ions
7 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
8 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
9 The relation V = IR represents
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
10 At any point on the right bisector of the line joining two equal and opposite charges
A. At electric field is zero
B. The electric potential is zero
C. The electric potential decreases with increasing distance from the centre
D. The electric field is perpendicular to the line joining the charges

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