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

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 2

106electrons are moving through a wire per second, the current developed is

Question # 3

The electric lines of force are

Question # 4

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

Question # 5

The unit of intensity of electric field is

Question # 6

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

Question # 7

Ohm's law states that

Question # 8

Resistance of a conductor is increased, the currant will

Question # 9

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

Question # 10

Which one of the following causes production of heat when current is set up in a wire?

Question # 11

The SI unit of capacitance is

Question # 12

One coulomb of charge is created by

Question # 13

Physicist George Simon ohm was a

Question # 14

The capacity of a parallel plat capacitor depends on the

Question # 15

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 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
A. 25
B. 225
C. 625
D. 1250
2 Electric generators which convert mechanical energy into
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
3 The resistance of a conductor does not depend on its
A. mass
B. resistivity
C. length
D. cross-sectional area
4 A condenser of capacity 50μF is charged to 10 V.The energy stored is
A. 1.25 x 10-3J
B. 3.75 x 10-3J
C. 2.5 x 10-3J
D. 5 x 10-3J
5 Which one of the following is the unit of electric field intensity
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1
6 An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
A. V/e
B. eV
C. e/V
D. V
7 In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be
A. 0.4 A
B. 11.4 A
C. 9.8 A
D. 10.6 A
8 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
9 Magnetic effect at a point caused due to flow a current depend upon the
A. Quantity of current
B. Distance from current
C. Both the quantity of current and distance from current element
D. None of the all
10 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates

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