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 a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be	A. 1/3 V B. 2/3 V C. 3/2 V D. 3V
2	Which one of the following has larger value of relative permitivity E_rat room temperature?	A. Vaccum B. Air C. Glass D. Water
3	A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor	A. Increases B. Decreases C. Remain unchanged D. Becomes infinite
4	If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us	A. parabola B. straight line C. hyper bola D. ellipse
5	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
6	The substances whose resistance decreases with the increase in temperature these substances have coefficient of	A. positive temperature B. negative temperature C. absolute temperature D. zero temperature
7	Which of the following does not obey ohm's law?	A. Copper B. Al C. Diode D. None
8	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
9	The SI unit of permitivity is	A. Nm²C² B. N^-1m^-2C² C. NmC² D. Nm²C^-1
10	The electric lines of force are	A. Imaginary B. Physically existing everywhere C. Physically existing near the charge D. All of the above

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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 electric flux is linked with a surface will be maximum when

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

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

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

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

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

The SI unit of permitivity is

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

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

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

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

The thermistors are usually made of

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

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

Resistance of a conductor is increased, the currant will

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

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

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

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

The relation V = IR represents

One coulomb of charge is created by

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

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Electron volt is the unit of.

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

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

The electric field will be uniform

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ECAT Physics Chapter 12 Important MCQ's

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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

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