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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 condenser of capacity 50μF is charged to 10 V.The energy stored is
Question # 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
Question # 3
The SI unit of permitivity is
Question # 4
The electric flux from a closed surface
Question # 5
The electric intensity at infinite distance from the point charge will be
Question # 6
Solar cell converts sunlight directly into
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 closed surface contains two equal and opposite charges. The net electric flux from the surface will be
Question # 10
The charge carriers in gases are
Question # 11
Resistance of a conductor is increased, the currant will
Question # 12
In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be
Question # 13
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 # 14
A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts
Question # 15
If the length of the conductor is double and its cross sectional area is halved, its conductance will
Question # 16
Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be
Question # 17
If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
Question # 18
A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be
Question # 19
Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be
Question # 20
In bringing an electron towards another electron, electrostatic potential energy of system
Question # 21
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 # 22
An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be
Question # 23
The resistance of an incandescent lamp is
Question # 24
The SI unit of electric flux is
Question # 25
In a voltmeter the conduction takes place due to
Question # 26
What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
Question # 27
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 # 28
Physicist George Simon ohm was a
Question # 29
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 # 30
The fractional change in resistance per kelvin is known as
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ECAT Physics Chapter 12 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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 |
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V
|
| 2 | 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 |
A. Coulomb's law
B. Gauss's law
C. Biot-Sarwat law
D. Ampere's law
|
| 3 | Which of the following does not obey ohm's law? |
A. Copper
B. Al
C. Diode
D. None
|
| 4 | If the distance of separation between two chares is increased, the electrical potential energy of the system will |
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
|
| 5 | The relation V = IR represents |
A. Ampere law
B. Faraday's law
C. Ohm's law
D. Len's law
|
| 6 | 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
|
| 7 | Electron volt is the unit of. |
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
|
| 8 | The dot product of electric field intensity E and vector area A is called |
A. Electric potential
B. Electric flux
C. Electric field
D. Magnetic field
|
| 9 | Which one of the following has larger value of relative permitivity Erat room temperature? |
A. Vaccum
B. Air
C. Glass
D. Water
|
| 10 | 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 |
A. -q
B. +q
C. -2q
D. +4q
|
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
baber
15 Feb 2019hi