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 capacity of a parallel plat capacitor depends on the	A. Type to metal used B. Thickness of plates C. Potential applied across the plates D. Separation between the plates
2	Cause of heat production in a current carrying conductor is	A. Collisions of free electrons with one another B. High drift speed of free electrons C. Collisions of free electrons with atoms or ions of conductor D. High resistance value
3	The SI unit of permitivity is	A. Nm²C² B. N^-1m^-2C² C. NmC² D. Nm²C^-1
4	The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is	A. Q=V/C B. Q=C/V C. Q=1/2CV D. Q=CV
5	A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy	A. 200 J B. 100 J C. 1000 J D. 400 J
6	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
7	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
8	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	A. They have the same potential B. They have the same amount of charge C. They have the same capacity D. They have the same shape
9		A. 5μF B. 10μF C. 3μF D. 6μF
10	A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is	A. Charge Q B. Potential V C. Capacity D. Energy U

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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

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

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

The relation V = IR represents

Electric flux is defined by the relation

If the two charges in Coulomb's law have double distance between them, then electric force

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

The energy stored in a charge capacitor

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

Surface density of charge is defined as

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

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

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

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

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

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

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

Cause of heat production in a current carrying conductor is

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

The fractional change in resistance per kelvin is known as

One joule is equal to

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

Electric generators which convert mechanical energy into

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

The electric flux is linked with a surface will be maximum when

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)

One coulomb per second is equal to

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Resistance of a conductor depends upon

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ECAT Physics Chapter 12 Important MCQ's

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