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	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	A. 5 volt B. 3 volt C. 15 volt D. 9 volt
2	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
3	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
4	Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be	A. 711μF B. 611μF C. 811μF D. 511μF
5	A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?	A. 3 x 10²⁰ B. 3 x 10¹⁰ C. 6 x 10²⁰ D. 6 x 10¹⁰
6	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	A. 120 C B. 240 C C. 20 C D. 4 C
7	A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be	A. 2 R B. R C. R/2 D. R/4
8	The electric lines of force are	A. Imaginary B. Physically existing everywhere C. Physically existing near the charge D. All of the above
9	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
10	In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes	A. Four-fold B. One-half C. One-fourth D. Zero

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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

Heating effect caused by an electric circuit is written

Equal charges are given to two spheres of different radii. The potential will

Resistance of a conductor depends upon

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

The SI unit of conductivity is

Which one of the following has larger value of relative permitivity Erat room temperature?

Which one of the following is the unit of electric field intensity

The earth's potential is taken as

If the length of the conductor is double and its cross sectional area is halved, its conductance will

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

The electrode connected with the positive terminal of the current source is called

Electric flux is defined by the relation

When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates

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

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

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

The SI unit of capacitance is

The SI unit of current is

The potential difference across each resistance in series combination is

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

The electric intensity outside the two oppositely charged parallel metal plates is

The unit of intensity of electric field is

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

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

Ohm is the unit of

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

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

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

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ECAT Physics Chapter 12 Important MCQ's

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

Which one of the following has larger value of relative permitivity E_rat room temperature?