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	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	A. power B. current C. resistance D. temperature
3	Current provided by a battery is maximum when	A. Internal resistance equal to external resistance B. Internal resistance is greater than external resistance C. Internal resistance is less then external resistance D. None of these
4	If a 40 watt light bulb burns for 2 hours. how much heat is generated	A. 288 x 10³J B. 288 x 10⁸J C. 288 x 10⁵J D. 288 x 10⁶J
5	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. 2 R B. R/4 C. R/2 D. R
6	One coulomb per second is equal to	A. One volt B. One ampere C. One hom D. One henry
7	The energy stored in a charge capacitor	A. 1/2CV² B. 1/2C²V C. 1/2C/V² D. None of these
8	One coulomb of charge is created by	A. 10 electrons B. 1.6 x 10^-19electrons C. 6.25 x 10¹⁸electrons D. 6.25 x 10²¹electrons
9	The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is	A. 4/5Ω B. 5/4Ω C. 20Ω D. 0.05 Ω
10	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

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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

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

The electric field intensity at a point due to a point charge

The capacitance of a parallel plate capacitor depends upon

If a 40 watt light bulb burns for 2 hours. how much heat is generated

Ohm's law states that

Potentiometer is more sensitive than voltmeter, because

The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of

The capacity of a parallel plat capacitor depends on the

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

The unit of resistance is

Coulomb's force between two point charges depends upon

Electric generators which convert mechanical energy into

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

Heating effect caused by an electric circuit is written

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

An electric charge at rest is

The unit of resistivity is

The resistivity of a substance depends upon the

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

Which of the following represents an electric current?

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

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

The SI unit of conductivity is

The thermistors are usually made of

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

The SI unit of electric field intensity is

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

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

The electric field will be uniform

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ECAT Physics Chapter 12 Important MCQ's

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An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be

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