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	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
2	A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is	A. Zero B. 0.5Ω C. 1.1Ω D. 5.0Ω
3	The energy stored in a charge capacitor	A. 1/2CV² B. 1/2C²V C. 1/2C/V² D. None of these
4	A closed surface contains two equal and opposite charges. The net electric flux from the surface will be	A. Negative B. Positive C. Infinite D. Zero
5	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
6	The electric field intensity at a point due to a point charge	A. Falls off inversely as the distance B. Falls off inversely as the square of distance C. Remains unchanged with distance D. Increase directly as square of distance
7	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
8	The minimum charge on any object can not be less than	A. 1.6 x 10^-19C B. 3.2 x 10^-19C C. 1.0 C D. 4.8 x 10^-19C
9	The charge carriers in gases are	A. electrons B. ions C. protons D. ions and electrons
10	Surface density of charge is defined as	A. Charge per unit volume B. Charge per unit length C. Charge per unit area D. Charge per unit mass

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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 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 piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

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

Some charge is being given to a conductor. Then its potential

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

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

The electric field due to an infinite long thin wire at a distance R varies as

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

Resistor is a device which convert electric energy to

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

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

For two resistance wires joined in parallel, the resultant resistance is 6/5 ohm. When one of the resistance wire breaks, the effective resistance becomes 2 ohm. The resistance of the broken wire is

The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately

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

At ordinary temperature, an increase in temperature increases the conductivity of

Potentiometer is more sensitive than voltmeter, because

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

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

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

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

The SI unit of electric field intensity is

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

The SI unit of current is

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 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

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

Solar cell converts sunlight directly into

Physicist George Simon ohm was a

Which one of the following causes production of heat when current is set up in a wire?

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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

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

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