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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 electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be
Question # 2
Resistance of a conductor is increased, the currant will
Question # 3
A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
Question # 4
The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
Question # 5
A closed surface contains two equal and opposite charges. The net electric flux from the surface will be
Question # 6
When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be
Question # 7
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 # 8
Free electrons are
Question # 9
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
Question # 10
The speed of randomly moving electrons depends upon
Question # 11
Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
Question # 12
The unit of resistivity is
Question # 13
Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
Question # 14
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 # 15
The SI unit of capacitance is
Question # 16
The SI unit of current is
Question # 17
The unit of conductance is
Question # 18
Electron volt is the unit of
Question # 19
One coulomb per second is equal to
Question # 20
The resistance of the given conductor can be increased by
Question # 21
An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
Question # 22
Which one of the following causes production of heat when current is set up in a wire?
Question # 23
Thermocouple is an arrangement of two different metals
Question # 24
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 # 25
The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of
Question # 26
The earth's potential is taken as
Question # 27
The fractional change in resistance per kelvin is known as
Question # 28
The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
Question # 29
A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
Question # 30
The value of electrical constant of proportionality k 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 -
S Salvaa Sheikh 13 - Sep - 2024 24 Min 16 Sec 85/120 -
S Sualeh Murtaza 15 - Nov - 2024 05 Min 29 Sec 80/120 -
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H Humera Noor 27 - Dec - 2024 19 Min 28 Sec 65/120
ECAT Physics Chapter 12 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is |
A. 10 KJ
B. 5 KJ
C. 2 KJ
D. 1 KJ
|
| 2 | A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is |
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
|
| 3 | The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as |
A. voltmeters
B. resistance
C. electrode
D. current
|
| 4 | The resistivity of a substance depends upon the |
A. length
B. mass
C. area
D. temperature
|
| 5 | Some charge is being given to a conductor. Then its potential |
A. Is maximum at surface
B. Is maximum at centre
C. Is remain same throughout the conductor
D. Is maximum somewhere between surface and centre
|
| 6 | An electric charge at rest is |
A. Only an electric field
B. Only a magnetic field
C. Both electric and magnetic fields
D. None of the above
|
| 7 | The unit of conductance is |
A. ohm
B. meter
C. mho
D. ohm-meter
|
| 8 | 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
|
| 9 | If we increase the distance between two plates of the capacitor, the capacitance will |
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
|
| 10 | A cube of metal is given a positive charge Q. For the above system, which of the following statements is true? |
A. Electric potential at the surface of the cube is zero
B. Electric potential within the cube is zero
C. Electric filed is normal to the surface of the cube
D. Electric filed varies within the cube
|
Test Questions