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

Question # 2

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

Question # 3

The charge carriers in electrolyte are positive and negative

Question # 4

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 # 5

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

Question # 6

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 # 7

One coulomb per second is equal to

Question # 8

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 9

The energy stored in a charge capacitor

Question # 10

The SI unit of capacitance is

Question # 11

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 # 12

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 # 13

Heating effect caused by an electric circuit is written

Question # 14

Solar cell converts sunlight directly into

Question # 15

The thermistors are usually made of

Question # 16

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

Question # 17

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

Question # 18

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 # 19

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

Question # 20

Thermocouple is an arrangement of two different metals

Question # 21

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 22

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

The unit of conductance is

Question # 27

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 28

Electron volt is the unit of.

Question # 29

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 # 30

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
2 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
3 The electric field will be uniform
A. Near a positive point charge
B. Near a negative point charge
C. Between two oppositely charged parallel metal plates
D. None of above
4 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
5 If the two charges in Coulomb's law have double distance between them, then electric force
A. Becomes two-fold
B. Becomes four-fold
C. Remains the same
D. None of these
6 A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is
A. Two
B. 1/2
C. Zero
D. 3/2
7 The dot product of electric field intensity E and vector area A is called
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
8 An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
A. 1 MeV
B. 2 MeV
C. 4 MeV
D. 8 MeV
9 The capacity of a parallel plat capacitor depends on the
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
10 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase

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