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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
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 # 2
Free electrons are
Question # 3
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 # 4
A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
Question # 5
Electric generators which convert mechanical energy into
Question # 6
In bringing an electron towards another electron, electrostatic potential energy of system
Question # 7
Thermocouple is an arrangement of two different metals
Question # 8
An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
Question # 9
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 # 10
In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
Question # 11
The electric intensity outside the two oppositely charged parallel metal plates is
Question # 12
The electric lines of force are
Question # 13
Resistance of a conductor is increased, the currant will
Question # 14
A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
Question # 15
The capacity of a parallel plat capacitor depends on the
Question # 16
Electric flux is defined by the relation
Question # 17
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 # 18
The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
Question # 19
A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is
Question # 20
The resistance of a conductor does not depend on its
Question # 21
Specific resistance of a wire depends upon
Question # 22
The liquid which conduct current is known as
Question # 23
Coulomb's force between two point charges depends upon
Question # 24
The SI unit of conductivity is
Question # 25
Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved
Question # 26
If the length of the conductor is double and its cross sectional area is halved, its conductance will
Question # 27
The value of electrical constant of proportionality k is
Question # 28
The SI unit of electric field intensity is
Question # 29
Which one of the following causes production of heat when current is set up in a wire?
Question # 30
If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
Top Scorers Of Physics ECAT Pre Engineering Chapter 12 Electrostatics MCQ`s Test
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M Mehreen Ather 02 - Dec - 2024 30 Min 19 Sec 90/120 -
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S Sualeh Murtaza 15 - Nov - 2024 05 Min 29 Sec 80/120 -
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ECAT Physics Chapter 12 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes |
A. Four-fold
B. One-half
C. One-fourth
D. Zero
|
| 2 | 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 |
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
|
| 3 | 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 |
A. 3/5 ohm
B. 2 ohm
C. 6/5 ohm
D. 3 ohm
|
| 4 | The resistivity of a substance depends upon the |
A. length
B. mass
C. area
D. temperature
|
| 5 | 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
|
| 6 | 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
|
| 7 |
|
A. 5μF
B. 10μF
C. 3μF
D. 6μF
|
| 8 | 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 |
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
|
| 9 | A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy |
A. 200 J
B. 100 J
C. 1000 J
D. 400 J
|
| 10 | Cause of heat production in a current carrying conductor is |
A. Collisions of free electrons with one another
B. High drift speed of free electrons
C. Collisions of free electrons with atoms or ions of conductor
D. High resistance value
|
Test Questions