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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 medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
Question # 2
The SI unit of current is
Question # 3
Electric flux is defined by the relation
Question # 4
Ohm's law states that
Question # 5
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 # 6
A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to
Question # 7
A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
Question # 8
In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes
Question # 9
A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be
Question # 10
The electric intensity outside the two oppositely charged parallel metal plates is
Question # 11
The value of electrical constant of proportionality k is
Question # 12
Heating effect caused by an electric circuit is written
Question # 13
One coulomb per second is equal to
Question # 14
Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become
Question # 15
Which one of the following is the unit of electric field intensity
Question # 16
The liquid which conduct current is known as
Question # 17
The charge per unit time through any cross-section of a conductor is called
Question # 18
Some charge is being given to a conductor. Then its potential
Question # 19
Electron volt is the unit of.
Question # 20
What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
Question # 21
The substances whose resistance decreases with the increase in temperature these substances have coefficient of
Question # 22
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 # 23
The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
Question # 24
The thermistors are usually made of
Question # 25
The unit of intensity of electric field is
Question # 26
A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when
Question # 27
A 60 W bulb operates on 220 V supply. The current flowing through the bulb is
Question # 28
A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?
Question # 29
The electric intensity at infinite distance from the point charge will be
Question # 30
A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
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 -
T Talha Khalil 18 - Jun - 2026 10 Min 55 Sec 80/120 -
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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 -
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H Hanook Masih 25 - Sep - 2024 12 Min 15 Sec 75/120 -
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H hussain naqvi 19 - Sep - 2024 18 Min 43 Sec 65/120 -
H Humera Noor 27 - Dec - 2024 19 Min 28 Sec 65/120
ECAT Physics Chapter 12 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The unit of resistivity is |
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
|
| 2 | 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
|
| 3 | The resistivity of a substance depends upon the |
A. length
B. mass
C. area
D. temperature
|
| 4 | The minimum charge on any object can not be less than |
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
|
| 5 | 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
|
| 6 | In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called |
A. Time constant
B. Decay constant
C. None of these
D. All of above
|
| 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 |
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
|
| 8 | 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
|
| 9 | 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
|
| 10 | At any point on the right bisector of the line joining two equal and opposite charges |
A. At electric field is zero
B. The electric potential is zero
C. The electric potential decreases with increasing distance from the centre
D. The electric field is perpendicular to the line joining the charges
|
Test Questions