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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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Total Questions30
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Time Allowed30
Physics ECAT Pre Engineering Chapter 12 Electrostatics
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Question # 1
An electric charge at rest is
Question # 2
The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
Question # 3
The electric intensity at infinite distance from the point charge will be
Question # 4
The resistivity of a substance depends upon the
Question # 5
Which one of the following causes production of heat when current is set up in a wire?
Question # 6
The current through a metallic conductor is due to the motion of
Question # 7
A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
Question # 8
A condenser of capacity 50μF is charged to 10 V.The energy stored is
Question # 9
An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
Question # 10
A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
Question # 11
A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
Question # 12
The liquid which conduct current is known as
Question # 13
The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
Question # 14
The resistance of a conductor does not depend on its
Question # 15
The charge per unit time through any cross-section of a conductor is called
Question # 16
If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be
Question # 17
A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?
Question # 18
The SI unit of conductivity is
Question # 19
Resistance of a conductor is increased, the currant will
Question # 20
The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be
Question # 21
Potentiometer is more sensitive than voltmeter, because
Question # 22
Which one of the following is the unit of electric field intensity
Question # 23
Solar cell converts sunlight directly into
Question # 24
The energy stored in a charge capacitor
Question # 25
The electric intensity outside the two oppositely charged parallel metal plates is
Question # 26
Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
Question # 27
The electric field intensity at a point due to a point charge
Question # 28
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
Question # 29
The fractional change in resistance per kelvin is known as
Question # 30
The unit of conductance is
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ECAT Physics Chapter 12 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The liquid which conduct current is known as |
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law
|
| 2 | Potentiometer is more sensitive than voltmeter, because |
A. Voltmeter has a very high resistance
B. Voltmeter has a very low resistance
C. Potentiometer does not draw any current from a source of unknown potential difference
D. Potentiometer is sensitive
|
| 3 | The unit of conductance is |
A. ohm
B. meter
C. mho
D. ohm-meter
|
| 4 | The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is |
A. 21 x 103+ 10%
B. 23 x 101+ 10%
C. 21 x 103+ 5%
D. 12 x 103+ 5%
|
| 5 | A 60 W bulb operates on 220 V supply. The current flowing through the bulb is |
A. 11/3 A
B. 3 A
C. 3/11 A
D. 6
|
| 6 | A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be |
A. Zero
B. 10Ω
C. 1Ω
D. 0.10Ω
|
| 7 | Coulomb's force between two point charges depends upon |
A. Magnitude of charges
B. Distance between them
C. Medium in which they are located
D. All of the above
|
| 8 | Which one of the following is the unit of electric field intensity |
A. JC-1
B. Vm-1
C. Cm-1
D. CJ-1
|
| 9 | 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
|
| 10 | Resistance of a conductor depends upon |
A. the quantity of current passing through it
B. the voltage applied between its end
C. its dimensions, physical state and nature of its material
D. all of the above
|
Test Questions
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fun day
02 Mar 2023Some answers are wrong
Hira arif
18 Jun 2019This website is grwst👍
Alisha
27 Apr 2019This website is great
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15 Feb 2019hi