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	The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is	A. 10 KJ B. 5 KJ C. 2 KJ D. 1 KJ
3	A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts	A. 1310 W B. 670 W C. 810 W D. 1210 W
4	At any point on the right bisector of the line joining two equal and opposite charges	A. At electric field is zero B. The electric potential is zero C. The electric potential decreases with increasing distance from the centre D. The electric field is perpendicular to the line joining the charges
5	If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy	A. Ve B. V/e C. e/V D. 2Ve
6	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	A. 25 B. 225 C. 625 D. 1250
7	A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be	A. 5 volt B. 3 volt C. 15 volt D. 9 volt
8	Potentiometer is more sensitive than voltmeter, because	A. Voltmeter has a very high resistance B. Voltmeter has a very low resistance C. Potentiometer does not draw any current from a source of unknown potential difference D. Potentiometer is sensitive
9	A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when	A. q = Q/4 B. q = Q/2 C. q = ! D. None of these
10	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above

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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 nature of capacity of electrostatic capacitor depends on

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

The graphical representation of ohm's law is

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

Current provided by a battery is maximum when

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

The resistivity of a substance depends upon the

Physicist George Simon ohm was a

The electrode connected with the positive terminal of the current source is called

The electric intensity outside the two oppositely charged parallel metal plates is

Which of the following represents an electric current?

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

The resistance of a conductor does not depend on its

If we increase the distance between two plates of the capacitor, the capacitance will

Resistance of a conductor is increased, the currant will

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

The SI unit of current is

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

Cause of heat production in a current carrying conductor is

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

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

A condenser of capacity 50μF is charged to 10 V.The energy stored is

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

Resistance of a conductor depends upon

Taking the earth to be a spherical conductor of diameter 12.8 x 103km. Its capacity will be

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

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

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

The SI unit of capacitance is

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ECAT Physics Chapter 12 Important MCQ's

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

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

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

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be