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	A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is	A. C B. C/2 C. Zero D. 2C
2	The resistance of the given conductor can be increased by	A. Increasing the area B. Changing resistivity C. Decreasing the length D. None of the above because change does not matter because in any case the volume remains the same
3	The charge carriers in gases are	A. electrons B. ions C. protons D. ions and electrons
4	Which one of the following causes production of heat when current is set up in a wire?	A. Fall of electrons from higher orbits to lower orbits B. Inter-atomic collisions C. Inter-electron collisions D. Collisions of conduction electron with atoms
5	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
6	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
7	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
8	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	A. They have the same potential B. They have the same amount of charge C. They have the same capacity D. They have the same shape
9	Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become	A. Zero B. F/2 C. F D. 2F
10	A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?	A. 3 x 10²⁰ B. 3 x 10¹⁰ C. 6 x 10²⁰ D. 6 x 10¹⁰

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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

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

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

One joule is equal to

The electric intensity outside the two oppositely charged parallel metal plates is

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

Resistance of a conductor depends upon

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

Current provided by a battery is maximum when

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

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

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

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

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

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 causes production of heat when current is set up in a wire?

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?

The graphical representation of ohm's law is

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

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)

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

A conducting wire is drawn to double its length. Final resistivity of the material will be

Specific resistance of a wire depends upon

Physicist George Simon ohm was a

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

Electric flux is defined by the relation

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

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

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

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

One electron volt is equal to

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ECAT Physics Chapter 12 Important MCQ's

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

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