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	One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is	A. 0.1 V B. 8 V C. 2 V D. 0.5 V
2	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
3	A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy	A. 200 J B. 100 J C. 1000 J D. 400 J
4	Which of the following does not obey ohm's law?	A. Copper B. Al C. Diode D. None
5	The fractional change in resistance per kelvin is known as	A. temperature coefficient B. resistance coefficient C. super temperature D. critical temperature
6	A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts	A. 1310 W B. 670 W C. 810 W D. 1210 W
7	Electron volt is the unit of	A. Potential difference B. Energy C. Resistance D. Capacitance
8	An electric charge at rest is	A. Only an electric field B. Only a magnetic field C. Both electric and magnetic fields D. None of the above
9	A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?	A. 108 g B. 10.8 g C. 0.8 g D. 108/0.8 g
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 unit of intensity of electric field is

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 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)

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)

106electrons are moving through a wire per second, the current developed is

If the two charges in Coulomb's law have double distance between them, then electric force

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

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

One coulomb of charge is created by

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

Magnetic effect at a point caused due to flow a current depend upon the

Resistor is a device which convert electric energy to

The minimum charge on any object can not be less than

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

The graphical representation of ohm's law is

The electrode connected with the positive terminal of the current source is called

The electric lines of force are

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

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Electric generators which convert mechanical energy into

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

The capacitance of a parallel plate capacitor depends upon

The SI unit of capacitance is

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

Electric flux is defined by the relation

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

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

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

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ECAT Physics Chapter 12 Important MCQ's

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10⁶electrons are moving through a wire per second, the current developed is

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

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