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 charge per unit time through any cross-section of a conductor is called

Question # 2

The capacity of a parallel plat capacitor depends on the

Question # 3

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

Question # 4

The resistance of an incandescent lamp is

Question # 5

The value of electrical constant of proportionality k is

Question # 6

The charge carriers in gases are

Question # 7

Electric generators which convert mechanical energy into

Question # 8

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

Question # 9

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

Question # 10

Physicist George Simon ohm was a

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

Heating effect caused by an electric circuit is written

Question # 13

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

Question # 14

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 15

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 # 16

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

Question # 17

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

Question # 18

The unit of intensity of electric field is

Question # 19

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 20

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

Question # 21

Surface density of charge is defined as

Question # 22

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 # 23

The electric intensity outside the two oppositely charged parallel metal plates is

Question # 24

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

Question # 25

One joule is equal to

Question # 26

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 27

The unit of resistivity is

Question # 28

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

Question # 29

Capacitance of two or more capacitors

Question # 30

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

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Sr.# Question Answer
1 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
2 An electric charge at rest is
A. Only an electric field
B. Only a magnetic field
C. Both electric and magnetic fields
D. None of the above
3 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
A. power
B. current
C. resistance
D. temperature
4 The SI unit of current is
A. watt
B. coulomb
C. volt
D. ampere
5 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
6 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
7 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature
8 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
9 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
10 If electric and gravitational force on an electron in a uniform electric field will be
A. E=mg/q
B. E=q/mg
C. E=,g/q
D. E=qg/m

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