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 uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 2

The relation between charge 'Q' and current 'I' is given by

Question # 3

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

Question # 4

The electric intensity at infinite distance from the point charge will be

Question # 5

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

Question # 6

Free electrons are

Question # 7

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

Question # 8

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

Question # 9

If the distance of separation between two chares is increased, the electrical potential energy of the system will

Question # 10

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

Question # 11

The SI unit of conductivity is

Question # 12

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

Question # 13

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

Question # 14

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 # 15

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

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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 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
3 In bringing an electron towards another electron, electrostatic potential energy of system
A. Decreases
B. Increases
C. Remains uncharged
D. Becomes zero
4 The resistance of a conductor does not depend on its
A. mass
B. resistivity
C. length
D. cross-sectional area
5
Question Image
A. 5μF
B. 10μF
C. 3μF
D. 6μF
6 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
7 An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)
A. Q/4πr2
B. 2Q/4πr2
C. Q.d
D. Zero
8 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
A. They have the same potential
B. They have the same amount of charge
C. They have the same capacity
D. They have the same shape
9 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
10 Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
A. R1= 2R2
B. R2= 2R1
C. R2 = 4R1
D. R1= 4R2

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