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

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 2

The unit of resistivity is

Question # 3

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

Question # 4

The electric flux from a closed surface

Question # 5

The nature of capacity of electrostatic capacitor depends on

Question # 6

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 # 7

The liquid which conduct current is known as

Question # 8

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 # 9

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

Question # 10

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

Question # 11

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

Question # 12

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 # 13

The SI unit of permitivity is

Question # 14

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

Question # 15

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 # 16

An electric charge at rest is

Question # 17

The capacitance of a parallel plate capacitor depends upon

Question # 18

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

Question # 19

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 # 20

The current through a metallic conductor is due to the motion of

Question # 21

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

Question # 22

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

Question # 23

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 24

The electrode connected with the positive terminal of the current source is called

Question # 25

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

Question # 26

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

Question # 27

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 28

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 29

The capacity of a parallel plat capacitor depends on the

Question # 30

The potential difference across each resistance in series combination is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
2 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
3 The nature of capacity of electrostatic capacitor depends on
A. Shape
B. Size
C. Thickness of plates
D. Area
4 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
5 Which one of the following causes production of heat when current is set up in a wire?
A. Fall of electrons from higher orbits to lower orbits
B. Inter-atomic collisions
C. Inter-electron collisions
D. Collisions of conduction electron with atoms
6 The electric intensity at infinite distance from the point charge will be
A. Infinite
B. Positive
C. Zero
D. Negative
7 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
8 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
9 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
10 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1

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