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

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 2

The SI unit of electric flux is

Question # 3

The nature of capacity of electrostatic capacitor depends on

Question # 4

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

Question # 5

A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when

Question # 6

Surface density of charge is defined as

Question # 7

The relation V = IR represents

Question # 8

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 # 9

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

Question # 10

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

Question # 11

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

Question # 12

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 # 13

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

Question # 14

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 15

Thermocouple is an arrangement of two different metals

Question # 16

Potentiometer is more sensitive than voltmeter, because

Question # 17

If electric and gravitational force on an electron in a uniform electric field will be

Question # 18

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

Question # 19

Ohm is the unit of

Question # 20

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

Question # 21

The SI unit of permitivity is

Question # 22

The SI unit of capacitance is

Question # 23

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

Question # 24

The speed of randomly moving electrons depends upon

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
2 The resistance of a conductor does not depend on its
A. mass
B. resistivity
C. length
D. cross-sectional area
3 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
4 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
5 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
6 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
A. Q=V/C
B. Q=C/V
C. Q=1/2CV
D. Q=CV
7 The unit of resistance is
A. volt
B. ampere
C. ohm
D. coat
8 If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us
A. parabola
B. straight line
C. hyper bola
D. ellipse
9 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
10 Which of the following represents an electric current?
A. C-1
B. CS-1
C. J.S-1
D. dynes-1

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