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 cube of metal is given a positive charge Q. For the above system, which of the following statements is true?	A. Electric potential at the surface of the cube is zero B. Electric potential within the cube is zero C. Electric filed is normal to the surface of the cube D. Electric filed varies within the cube
2	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	A. 3/5 ohm B. 2 ohm C. 6/5 ohm D. 3 ohm
3	The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will	A. Increase B. Decrease C. Remain F D. Become 10F/9
4	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
5	A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be	A. Zero B. 10Ω C. 1Ω D. 0.10Ω
6	Specific resistance of a wire depends upon	A. Length B. Cross-section area C. Mass D. None
7	Ohm established a relation between	A. voltage and resistance B. voltage and charge C. voltage and current D. voltage resistance and charge
8	Thermocouple is an arrangement of two different metals	A. To convert heat energy in to electrical energy B. To produce more heat C. To convert heat energy into chemical energy D. To convert electric energy in to heat energy
9	In a charged capacitor the energy is stored in	A. Both in positive and negative charges B. Positive charges C. The edges of the capacitor plates D. The electric field between the plates
10	Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved	A. 1.92 N B. 19.2 N C. 12 N D. 0.192 N

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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

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

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

Physicist George Simon ohm was a

The SI unit of electric flux is

In bringing an electron towards another electron, electrostatic potential energy of system

Electric generators which convert mechanical energy into

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

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

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

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

The charge carriers in gases are

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

The unit of intensity of electric field is

The speed of randomly moving electrons depends upon

Potentiometer is more sensitive than voltmeter, because

Ohm is the unit of

The concept of field theory was put forward by

The electric field will be uniform

Electron volt is the unit of.

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

The liquid which conduct current is known as

If the distance of separation between two chares is increased, the electrical potential energy of the system will

The relation V = IR represents

The SI unit of current is

Capacitance of two or more capacitors

Ohm established a relation between

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

In a voltmeter the conduction takes place due to

The resistance of an incandescent lamp is

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