ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

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Humera Noor 27 - Dec - 2024 19 Min 28 Sec 65/120

ECAT Physics Chapter 12 Important MCQ's

Sr.#	Question	Answer
1	If the two charges in Coulomb's law have double distance between them, then electric force	A. Becomes two-fold B. Becomes four-fold C. Remains the same D. None of these
2	A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to	A. -q B. +q C. -2q D. +4q
3	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
4	The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is	A. 9 x 10⁵V B. 9 V C. 8 x 10⁶V D. 80 V
5	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
6	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
7	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
8	Resistance of a conductor depends upon	A. the quantity of current passing through it B. the voltage applied between its end C. its dimensions, physical state and nature of its material D. all of the above
9	Capacitance of two or more capacitors	A. Increases in series combination B. Increases in parallel combination C. Remains unchanged D. None of the above
10	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

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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 thermistors are usually made of

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

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

Thermocouple is an arrangement of two different metals

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

If the distance of separation between two chares is increased, the electrical potential energy of the system will

The resistivity of a substance depends upon the

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

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

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

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

One coulomb of charge is created by

The unit of conductance is

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

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

Potentiometer is more sensitive than voltmeter, because

Electric flux is defined by the relation

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 ohm's is defined as

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

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

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

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

One coulomb per second is equal to

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

The SI unit of current is

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

Heating effect caused by an electric circuit is written

The SI unit of permitivity is

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ECAT Physics Chapter 12 Important MCQ's

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