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 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is	A. Zero B. 0.5Ω C. 1.1Ω D. 5.0Ω
2	The earth's potential is taken as	A. Negative B. Positive C. Zero D. Infinite
3	Ohm established a relation between	A. voltage and resistance B. voltage and charge C. voltage and current D. voltage resistance and charge
4	One coulomb per second is equal to	A. One volt B. One ampere C. One hom D. One henry
5	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	A. 1840 KeV B. 1/1840 KeV C. 1 KeV D. 920 KeV
6	The ohm's is defined as	A. 1 ampere / 1 volts B. 1 coulomb / 1 volt C. 1 volt / 1 ampere D. 1 volt / 1 coulomb
7	The relation V = IR represents	A. Ampere law B. Faraday's law C. Ohm's law D. Len's law
8	Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?	A. 3RΩ B. 2R/4Ω C. R/3Ω D. 2R/3Ω
9	The unit of resistance is	A. volt B. ampere C. ohm D. coat
10	A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is	A. C B. C/2 C. Zero D. 2C

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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 unit of conductance 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 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

The potential difference across each resistance in series combination is

The charge carriers in electrolyte are positive and negative

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

Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?

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

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Resistor is a device which convert electric energy to

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

If the two charges in Coulomb's law have double distance between them, then electric force

The SI unit of electric flux is

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

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

The electric intensity at infinite distance from the point charge 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)

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

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

Some charge is being given to a conductor. Then its potential

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

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points 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

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

The concept of field theory was put forward by

The electric field due to an infinite long thin wire at a distance R varies as

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10-19C. The number of excess electrons on the drop is

The SI unit of conductivity is

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

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ECAT Physics Chapter 12 Important MCQ's

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A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is