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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
The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to
Question # 2
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
Question # 3
The potential difference across each resistance in series combination is
Question # 4
A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
Question # 5
A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then
Question # 6
The SI unit of current is
Question # 7
One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
Question # 8
The resistivity of a substance depends upon the
Question # 9
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
Question # 10
Resistance of a conductor is increased, the currant will
Question # 11
A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is
Question # 12
Consider a spherical shell of metal at he centre of which a positive point charge is kept
Question # 13
Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then
Question # 14
The electric intensity outside the two oppositely charged parallel metal plates is
Question # 15
Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends
Question # 16
Free electrons are
Question # 17
The SI unit of electric flux is
Question # 18
A conducting wire is drawn to double its length. Final resistivity of the material will be
Question # 19
When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
Question # 20
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 # 21
One electron volt is equal to
Question # 22
A (100 W , 200 W) bulb is connected to a 160 V power supply. The power consumption would be
Question # 23
The electric field will be uniform
Question # 24
If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us
Question # 25
The resistance of a conductor does not depend on its
Question # 26
If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be
Question # 27
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 # 28
A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
Question # 29
The value of electrical constant of proportionality k is
Question # 30
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
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 -
N Nitalaya Hassan 23 - Dec - 2024 06 Min 15 Sec 80/120 -
F Fatima Anis 26 - Dec - 2024 13 Min 35 Sec 80/120 -
A Abdullah Zubair 25 - Dec - 2024 14 Min 30 Sec 80/120 -
C Ch Ubaid Ullah 06 - Mar - 2026 17 Min 40 Sec 80/120 -
H Hanook Masih 25 - Sep - 2024 12 Min 15 Sec 75/120 -
F Furqan Asif 26 - Mar - 2026 36 Min 02 Sec 72/120 -
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Z Zaka Ullah 09 - Nov - 2024 07 Min 20 Sec 60/120
ECAT Physics Chapter 12 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is |
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
|
| 2 | A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is |
A. Two
B. 1/2
C. Zero
D. 3/2
|
| 3 | Electric generators which convert mechanical energy into |
A. solar energy
B. thermal energy
C. kinetic energy
D. electrical energy
|
| 4 | Heating effect caused by an electric circuit is written |
A. H = I2Rt
B. H = I2R
C. H = IR2t
D. H = IR2
|
| 5 | The value of electrical constant of proportionality k is |
A. 9 x 109Nm2C-2
B. 9 x 10-9Nm2C-2
C. 9 x 1010Nm2C2
D. 9.85 x 10-12N-1C-2
|
| 6 | 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
|
| 7 | The unit of conductance is |
A. ohm
B. meter
C. mho
D. ohm-meter
|
| 8 | If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us |
A. parabola
B. straight line
C. hyper bola
D. ellipse
|
| 9 | Battery is charged in motor cars, which is based on |
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None
|
| 10 | A closed surface contains two equal and opposite charges. The net electric flux from the surface will be |
A. Negative
B. Positive
C. Infinite
D. Zero
|
Test Questions