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	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
2	The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is	A. 4/5Ω B. 5/4Ω C. 20Ω D. 0.05 Ω
3	The electric flux from a closed surface	A. Is independent of the shape of the surface B. Depends on the charge enclosed by the surface C. Both a and b D. None of the above
4	The ohm's is defined as	A. 1 ampere / 1 volts B. 1 coulomb / 1 volt C. 1 volt / 1 ampere D. 1 volt / 1 coulomb
5	The SI unit of conductivity is	A. ohm-m B. ohm^-1m^-1 C. ohm-m^-1 D. ohm^-1m
6	If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy	A. Ve B. V/e C. e/V D. 2Ve
7	The resistance of a conductor does not depend on its	A. mass B. resistivity C. length D. cross-sectional area
8	The resistance of an incandescent lamp is	A. Smaller when switched on B. Greater when switched off C. The same whether it is switch off or switch on D. Greater when switched on
9	The conventional current in a circuit is defined as " current which passes from a point at higher potential to a point at lower potential as if it represent a movement of	A. negative charges B. positive charges C. protons D. electrons
10	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	A. Zero B. 10Ω C. 1Ω D. 0.10Ω

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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

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

The minimum charge on any object can not be less than

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 excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is

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

The charge carriers in electrolyte are positive and negative

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

Electric generators which convert mechanical energy into

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

The electric intensity at infinite distance from the point charge will be

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

At any point on the right bisector of the line joining two equal and opposite charges

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

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

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

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

106electrons are moving through a wire per second, the current developed 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 two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

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

Coulomb force, when any material medium is placed between two charges

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

The value of electrical constant of proportionality k is

The capacity of a parallel plat capacitor depends on the

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

The nature of capacity of electrostatic capacitor depends on

The unit of conductance is

If the resistance of 2 ohm and 4 ohm are connected in parallel, the equivalent resistance will be

Ohm established a relation between

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ECAT Physics Chapter 12 Important MCQ's

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The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is

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

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

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

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