ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	The nature of capacity of electrostatic capacitor depends on	A. Shape B. Size C. Thickness of plates D. Area
2	If electric and gravitational force on an electron in a uniform electric field will be	A. E=mg/q B. E=q/mg C. E=,g/q D. E=qg/m
3	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
4	Physicist George Simon ohm was a	A. German physical B. French physicist C. Chinese physicist D. Russian physicist
5	If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be	A. 6 ohm B. 4 ohm C. zero ohm D. 1.33 ohm
6	The electric field due to an infinite long thin wire at a distance R varies as	A. 1/R B. 1/R² C. R D. R²
7	Electric flux is defined by the relation	A. E.A. B. E x A C. E/A D. none of these
8	One joule is equal to	A. 1.6 x 10¹⁹eV B. 6.25 x 10¹⁸eV C. 1.6 x 18¹⁸eV D. 6.25 x 10¹⁹eV
9	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
10	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	A. Zero B. F/2 C. F D. 2F

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ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

Physics ECAT Pre Engineering Chapter 12 Electrostatics

Potentiometer is more sensitive than voltmeter, because

The dot product of electric field intensity E and vector area A is called

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

The SI unit of electric field intensity is

The unit of intensity of electric field is

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

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

106electrons are moving through a wire per second, the current developed is

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

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

The capacitance of a parallel plate capacitor depends upon

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

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

The current through a metallic conductor is due to the motion of

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

The SI unit of capacitance is

An electric charge at rest is

The charge carriers in electrolyte are positive and negative

Electric potential of earth is taken to be zero because the earth is good

The relation V = IR represents

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Resistor is a device which convert electric energy to

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Which one of the following causes production of heat when current is set up in a wire?

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

The conductivity of a superconductor is

Heating effect caused by an electric circuit is written

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ECAT Physics Chapter 12 Important MCQ's

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10⁶electrons are moving through a wire per second, the current developed is

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

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be