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	Which of the following represents an electric current?	A. C^-1 B. CS^-1 C. J.S^-1 D. dynes^-1
2	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	A. 2 R B. R C. R/2 D. R/4
3	Specific resistance of a wire depends upon	A. Length B. Cross-section area C. Mass D. None
4	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
5	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
6	One electron volt is equal to	A. 1.6 x 1019eV B. 6.25 x 1018 eV C. 1.6 x 1018 eV D. 6.25 x 1019eV
7	The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is	A. 10Ω B. 20Ω C. 30Ω D. 40Ω
8	A 60 W bulb operates on 220 V supply. The current flowing through the bulb is	A. 11/3 A B. 3 A C. 3/11 A D. 6
9	The nature of capacity of electrostatic capacitor depends on	A. Shape B. Size C. Thickness of plates D. Area
10	The graphical representation of ohm's law is	A. hyperbola B. straight line C. ellipse D. parabola

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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

The ohm's is defined as

The electric flux from a closed surface

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes

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

The resistance of an incandescent lamp is

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

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

Coulomb's force between two point charges depends upon

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

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

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

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

The unit of conductance is

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

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

The fractional change in resistance per kelvin is known as

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

An alpha particle is accelerated through a potential difference of 106volt. Its kinetic energy will be

The charge carriers in gases are

Electron volt is the unit of.

Resistance of a conductor is increased, the currant will

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

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

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

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

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

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

The concept of field theory was put forward by

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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?

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved

An alpha particle is accelerated through a potential difference of 10⁶volt. Its kinetic energy will be