ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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123 Abcd 07 - Nov - 2024 12 Min 46 Sec 55/120
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ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	Which of the following does not obey ohm's law?	A. Copper B. Al C. Diode D. None
2		A. 5μF B. 10μF C. 3μF D. 6μF
3	One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is	A. 0.1 V B. 8 V C. 2 V D. 0.5 V
4	If the length of the conductor is double and its cross sectional area is halved, its conductance will	A. Increase four fold B. Become one-fourth C. Become one-half D. Remains unchanged
5	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
6	If the distance of separation between two chares is increased, the electrical potential energy of the system will	A. Increase B. Decrease C. May increase or decrease D. Remain the same
7	Which one of the following causes production of heat when current is set up in a wire?	A. Fall of electrons from higher orbits to lower orbits B. Inter-atomic collisions C. Inter-electron collisions D. Collisions of conduction electron with atoms
8	The value of electrical constant of proportionality k is	A. 9 x 10⁹Nm²C^-2 B. 9 x 10^-9Nm²C^-2 C. 9 x 10¹⁰Nm²C² D. 9.85 x 10^-12N^-1C^-2
9	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
10	Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is	A. 11.0 ohm B. 1.0 ohm C. 7.0 ohm D. 3.0 ohm

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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 resistance is

The speed of randomly moving electrons depends upon

The resistance of the given conductor can be increased by

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

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

Electron volt is the unit of.

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

Electron volt is the unit of

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

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

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

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

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

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

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

Resistance of a conductor is increased, the currant will

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

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?

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

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

One electron volt is equal to

Resistor is a device which convert electric energy to

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

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

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

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

The earth's potential is taken as

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

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

What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?

The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then