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 nature of capacity of electrostatic capacitor depends on	A. Shape B. Size C. Thickness of plates D. Area
2	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
3	A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then	A. The charge in the plates reduces and potential difference increase B. Potential difference between the plates increase, stored energy decreases and charge remains the same C. Potential difference between the plates decreases and charge remains unchanged D. None of the above
4	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
5	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
6	Surface density of charge is defined as	A. Charge per unit volume B. Charge per unit length C. Charge per unit area D. Charge per unit mass
7	The SI unit of electric flux is	A. Weber B. Nm²C^-1 C. NmC^-1 D. Nm^-2C
8	The unit of resistivity is	A. ohm B. ohm-m² C. ohm-meter D. ohm-m^-1
9	The charge carriers in electrolyte are positive and negative	A. protons B. electrons C. ions D. none of these
10	The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as	A. voltmeters B. resistance C. electrode D. current

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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

Electric potential of earth is taken to be zero because the earth is good

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

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

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

Coulomb force, when any material medium is placed between two charges

Two conductors having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be

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

Heating effect caused by an electric circuit is written

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

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

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

At any point on the right bisector of the line joining two equal and opposite charges

The concept of field theory was put forward by

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

The conductivity of a superconductor is

The SI unit of capacitance is

Ohm is the unit of

Ohm's law states that

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

The resistivity of a substance depends upon the

Capacitance of two or more capacitors

One electron volt is equal to

The SI unit of conductivity is

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

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

Magnetic effect at a point caused due to flow a current depend upon the

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

The charge carriers in gases are

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?

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ECAT Physics Chapter 12 Important MCQ's

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The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately