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 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
2	A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be	A. 64 W B. 80 W C. 100 W D. 125 W
3	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
4	Free electrons are	A. tightly bound B. fixed C. loosely bound D. tightly fixed
5	A 60 W bulb operates on 220 V supply. The current flowing through the bulb is	A. 11/3 A B. 3 A C. 3/11 A D. 6
6	The charge carriers in gases are	A. electrons B. ions C. protons D. ions and electrons
7	The thermistors are usually made of	A. Metals with low temperature coefficient of resistivity B. Metals with high temperature coefficient of resistivity C. Metal oxides with high temperature coefficient of resistivity D. Semi conducting materials having low temperature coefficient of resistivity
8	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
9	If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be	A. 6 ohm B. 4 ohm C. zero ohm D. 1.33 ohm
10	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

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

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

Electric flux is defined by the relation

The unit of resistance is

106electrons are moving through a wire per second, the current developed is

The conductivity of a superconductor is

The SI unit of capacitance is

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

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor 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

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Free electrons are

Heating effect caused by an electric circuit is written

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

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 force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

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

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

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

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

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

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

The thermistors are usually made of

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

In a charged capacitor the energy is stored in

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

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

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

One coulomb per second is equal to

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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?

10⁶electrons are moving through a wire per second, the current developed is

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