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 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	A. Two B. 1/2 C. Zero D. 3/2
2	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
3	The dot product of electric field intensity E and vector area A is called	A. Electric potential B. Electric flux C. Electric field D. Magnetic field
4	The electric field intensity at a point due to a point charge	A. Falls off inversely as the distance B. Falls off inversely as the square of distance C. Remains unchanged with distance D. Increase directly as square of distance
5	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	A. 3/5 ohm B. 2 ohm C. 6/5 ohm D. 3 ohm
6	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
7	A conducting wire is drawn to double its length. Final resistivity of the material will be	A. Double of the original one B. Half of the original one C. One fourth of the original one D. Same as original one
8	The charge carriers in electrolyte are positive and negative	A. protons B. electrons C. ions D. none of these
9	Solar cell converts sunlight directly into	A. potential energy B. thermal energy C. mechanical energy D. electrical energy
10	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

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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 capacitance of a parallel plate capacitor depends upon

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

The resistance of 20 cm long wire is 10Ω. When the length is changed to 40 cm. The new resistance is

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

Resistance of a conductor is increased, the currant 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

The minimum charge on any object can not be less than

Which one of the following has larger value of relative permitivity Erat room temperature?

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

Which one of the following is the unit of electric field intensity

Which of the following represents an electric current?

Electron volt is the unit of

Physicist George Simon ohm was a

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

The resistance of the given conductor can be increased by

An electric charge at rest is

If electric and gravitational force on an electron in a uniform electric field will be

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

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

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

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

In Pakistan electricity is supplied for domestic use at 220 V, it is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in Pakistan is R, the resistance of a 60 W bulb for use in USA will be

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

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

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

Potentiometer is more sensitive than voltmeter, because

Equal charges are given to two spheres of different radii. The potential will

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

The SI unit of current is

The SI unit of capacitance 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

Which one of the following has larger value of relative permitivity E_rat room temperature?

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