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	Electric generators which convert mechanical energy into	A. solar energy B. thermal energy C. kinetic energy D. electrical energy
2	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
3	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	A. 1 : 2 B. 2 : 1 C. 1 : 4 D. 4 : 1
4	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	A. -10 N B. +10 N C. +20 N D. -20 N
5	Electron volt is the unit of	A. Potential difference B. Energy C. Resistance D. Capacitance
6	Heating effect caused by an electric circuit is written	A. H = I²Rt B. H = I²R C. H = IR²t D. H = IR²
7	The unit of conductance is	A. ohm B. meter C. mho D. ohm-meter
8	The SI unit of permitivity is	A. Nm²C² B. N^-1m^-2C² C. NmC² D. Nm²C^-1
9	10⁶electrons are moving through a wire per second, the current developed is	A. 1.6 x 10^-19 B. 1 A C. 1.6 x 10^-15A D. 10⁶A
10	The charge per unit time through any cross-section of a conductor is called	A. capacitance B. electric power C. current D. potential difference

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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 thermistors are usually made of

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

The relation V = IR represents

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 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

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

Which of the following represents an electric current?

The SI unit of permitivity is

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

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

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

The unit of resistance is

Specific resistance of a wire depends upon

At ordinary temperature, an increase in temperature increases the conductivity of

An electric charge at rest is

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

The unit of intensity of electric field is

Electron volt is the unit of.

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

The electric intensity at infinite distance from the point charge will be

The SI unit of capacitance is

Magnetic effect at a point caused due to flow a current depend upon the

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

The SI unit of electric field intensity is

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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

The graphical representation of ohm's law is

Consider a spherical shell of metal at he centre of which a positive point charge is kept

The capacity of a parallel plat capacitor depends on the

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

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