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	The SI unit of conductivity is	A. ohm-m B. ohm^-1m^-1 C. ohm-m^-1 D. ohm^-1m
2	The resistance of the given conductor can be increased by	A. Increasing the area B. Changing resistivity C. Decreasing the length D. None of the above because change does not matter because in any case the volume remains the same
3	Electric generators which convert mechanical energy into	A. solar energy B. thermal energy C. kinetic energy D. electrical energy
4	If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be	A. 5μF B. 20μF C. 10μF D. 15μF
5	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
6	The concept of field theory was put forward by	A. Franklin B. Kepler C. Oersted D. Michael Faraday
7	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)	A. 2 B. 1 C. 0.5 D. 1.5
8	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	A. 7.20 N B. 11.25 N C. 22.50 N D. 45.00
9	The electric flux is linked with a surface will be maximum when	A. The surface is held parallel to the electric field B. The surface is held perpendicular to the electric field C. The surface makes an angle of 45° with the electric field D. All of the above
10	The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is	A. 21 x 10³+ 10% B. 23 x 10¹+ 10% C. 21 x 10³+ 5% D. 12 x 10³+ 5%

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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

Which of the following does not obey ohm's law?

The charge carriers in gases are

The nature of capacity of electrostatic capacitor depends on

The relation between charge 'Q' and current 'I' is given by

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

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

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

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

Solar cell converts sunlight directly into

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

Potentiometer is more sensitive than voltmeter, because

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

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

The resistance of an incandescent lamp is

Resistance of a conductor is increased, the currant will

The SI unit of conductivity is

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

The unit of intensity of electric field is

The unit of resistance is

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

Ohm established a relation between

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

The electric flux from a closed surface

The capacitance of a parallel plate capacitor depends upon

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?

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

The unit of conductance is

The fractional change in resistance per kelvin is known as

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

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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?