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	Some charge is being given to a conductor. Then its potential	A. Is maximum at surface B. Is maximum at centre C. Is remain same throughout the conductor D. Is maximum somewhere between surface and centre
2	The resistance of an incandescent lamp is	A. Smaller when switched on B. Greater when switched off C. The same whether it is switch off or switch on D. Greater when switched on
3	Three resistors of resistance R each are combined in various ways. Which of the following cannot be obtained?	A. 3RΩ B. 2R/4Ω C. R/3Ω D. 2R/3Ω
4	One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is	A. 0.1 V B. 8 V C. 2 V D. 0.5 V
5	Electric potential of earth is taken to be zero because the earth is good	A. Semiconductor B. Conductor C. Insulator D. Dielectric
6	If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be	A. 6 ohm B. 4 ohm C. zero ohm D. 1.33 ohm
7	Ohm's law states that	A. The current through a resistor is directly proportional to the applied voltage B. The voltage across a resistor is directly proportional to the current passing through it C. Resistance is the constant of proportionality between the voltage and current D. all of these
8	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
9	Which one of the following has larger value of relative permitivity E_rat room temperature?	A. Vaccum B. Air C. Glass D. Water
10	The SI unit of current is	A. watt B. coulomb C. volt D. ampere

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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

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

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

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

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

106electrons are moving through a wire per second, the current developed is

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

One coulomb per second is equal to

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

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 electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

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?

If electric and gravitational force on an electron in a uniform electric field will be

Potentiometer is more sensitive than voltmeter, because

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

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

Coulomb's force between two point charges depends upon

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

If the length of the conductor is double and its cross sectional area is halved, its conductance will

The conductivity of a superconductor is

The current through a metallic conductor is due to the motion of

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

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

The SI unit of current is

The fractional change in resistance per kelvin is known as

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

The electric field intensity at a point due to a point charge

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

Which one of the following is the unit of electric field intensity

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

In a charged capacitor the energy is stored in

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ECAT Physics Chapter 12 Important MCQ's

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10⁶electrons are moving through a wire per second, the current developed is

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is