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	The electric flux from a closed surface	A. Is independent of the shape of the surface B. Depends on the charge enclosed by the surface C. Both a and b D. None of the above
3	Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is	A. 11.0 ohm B. 1.0 ohm C. 7.0 ohm D. 3.0 ohm
4	The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately	A. 9.8 B. 24 x 10¹⁹ C. 24 x 10⁴² D. 24 x 10^-44
5	In bringing an electron towards another electron, electrostatic potential energy of system	A. Decreases B. Increases C. Remains uncharged D. Becomes zero
6	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
7	The charge carriers in electrolyte are positive and negative	A. protons B. electrons C. ions D. none of these
8	A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J	A. 5 B. 0.5 C. 0.005 D. 50
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 SI unit of electric field intensity is	A. CN^-1 B. NC^-1or Vm^-1 C. JC^-1 D. AV^-1

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

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

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

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

Coulomb's force between two point charges depends upon

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

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

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)

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

A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?

Electron volt is the unit of

Which one of the following has larger value of relative permitivity Erat room temperature?

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 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 conducting wire is drawn to double its length. Final resistivity of the material will be

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

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

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

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

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

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

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

The liquid which conduct current is known as

The minimum charge on any object can not be less than

Ohm is the unit of

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

Equal charges are given to two spheres of different radii. The potential will

Solar cell converts sunlight directly into

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

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ECAT Physics Chapter 12 Important MCQ's

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Which one of the following has larger value of relative permitivity E_rat room temperature?

A car battery has e.m.f 12 volt and internal resistance 5 x 10^-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?