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 SI unit of electric field intensity is	A. CN^-1 B. NC^-1or Vm^-1 C. JC^-1 D. AV^-1
2	Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then	A. R₁= 2R₂ B. R₂= 2R₁ C. R₂=4R₁ D. R₁= 4R₂
3	In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is	A. 3.9 B. 4 C. 4.2 D. 6
4	The electric field due to an infinite long thin wire at a distance R varies as	A. 1/R B. 1/R² C. R D. R²
5	The charge carriers in electrolyte are positive and negative	A. protons B. electrons C. ions D. none of these
6	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?	A. Zero B. 5μC m^-2 C. 20μC m^-2 D. 8μC m^-2
7	The fractional change in resistance per kelvin is known as	A. temperature coefficient B. resistance coefficient C. super temperature D. critical temperature
8	The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of	A. negative charges B. positive charges C. protons D. electrons
9	At ordinary temperature, an increase in temperature increases the conductivity of	A. Conductor B. Semiconductor C. Insulator D. Alloy
10	Coulomb's force between two point charges depends upon	A. Magnitude of charges B. Distance between them C. Medium in which they are located 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

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

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

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

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

Electron volt is the unit of.

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

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

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)

Free electrons are

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

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

The electric field will be uniform

Surface density of charge is defined as

Electron volt is the unit of

Ohm is the unit of

The SI unit of electric flux is

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?

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

The concept of field theory was put forward by

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 current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

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

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

The charge carriers in electrolyte are positive and negative

Resistor is a device which convert electric energy to

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

The SI unit of permitivity is

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

The ohm's is defined as

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ECAT Physics Chapter 12 Important MCQ's

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A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?