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	If electric and gravitational force on an electron in a uniform electric field will be	A. E=mg/q B. E=q/mg C. E=,g/q D. E=qg/m
2	When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be	A. 180 watt B. 10 watt C. 20 watt D. 60 watt
3	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?	A. 60 W bulb B. 100 W bulb C. Both equally D. None of these
4	The value of electrical constant of proportionality k is	A. 9 x 10⁹Nm²C^-2 B. 9 x 10^-9Nm²C^-2 C. 9 x 10¹⁰Nm²C² D. 9.85 x 10^-12N^-1C^-2
5	The SI unit of electric flux is	A. Weber B. Nm²C^-1 C. NmC^-1 D. Nm^-2C
6	If we increase the distance between two plates of the capacitor, the capacitance will	A. Increase B. Decrease C. Remain same D. First increase then decrease
7	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. 5 volt B. 3 volt C. 15 volt D. 9 volt
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	A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes	A. 2R B. 4R C. 16R D. Zero
10	Solar cell converts sunlight directly into	A. potential energy B. thermal energy C. mechanical energy D. electrical energy

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

The earth's potential is taken as

Thermocouple is an arrangement of two different metals

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

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

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

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

Which of the following represents an electric current?

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

The resistance of a conductor does not depend on its

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

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

The unit of resistivity is

Heating effect caused by an electric circuit is written

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

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 concept of field theory was put forward by

The unit of conductance is

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

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

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

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

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

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

Battery is charged in motor cars, which is based on

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

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

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ECAT Physics Chapter 12 Important MCQ's

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

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

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

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