ECAT Pre General Science Chapter 12 online mcq test with answers for Physics chapter 12 (Electrostatics)

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ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	One joule is equal to	A. 1.6 x 10¹⁹eV B. 6.25 x 10¹⁸eV C. 1.6 x 18¹⁸eV D. 6.25 x 10¹⁹eV
2	The potential difference across each resistance in series combination is	A. same B. different C. zero D. none of these
3	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
4	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. 0.1 watt B. 1 watt C. 10 watt D. 100 watt
5	Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become	A. Zero B. F/2 C. F D. 2F
6	The dot product of electric field intensity E and vector area A is called	A. Electric potential B. Electric flux C. Electric field D. Magnetic field
7	The conductivity of a superconductor is	A. Infinite B. Very large C. Very small D. Zero
8	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
9	In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called	A. Time constant B. Decay constant C. None of these D. All of above
10	The electric field will be uniform	A. Near a positive point charge B. Near a negative point charge C. Between two oppositely charged parallel metal plates D. None of above

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ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

ECAT Pre General Science Physics Chapter 12 Electrostatics

In a voltmeter the conduction takes place due to

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

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

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 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

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

The potential difference across each resistance in series combination is

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

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

Electric flux is defined by the relation

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

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

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

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

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

The electric intensity at infinite distance from the point charge will be

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

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

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

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

Ohm established a relation between

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

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

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

The unit of intensity of electric field is

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 unit of conductance is

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

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

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ECAT Physics Chapter 12 Important MCQ's

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An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be

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