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 the distance of separation between two chares is increased, the electrical potential energy of the system will	A. Increase B. Decrease C. May increase or decrease D. Remain the same
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	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)	A. Q/4πr² B. 2Q/4πr² C. Q.d D. Zero
4	Electric flux is defined by the relation	A. E.A. B. E x A C. E/A D. none of these
5	Magnetic effect at a point caused due to flow a current depend upon the	A. Quantity of current B. Distance from current C. Both the quantity of current and distance from current element D. None of the all
6	The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately	A. 9.8 B. 24 x 10¹⁹ C. 24 x 10⁴² D. 24 x 10^-44
7	The electric flux is linked with a surface will be maximum when	A. The surface is held parallel to the electric field B. The surface is held perpendicular to the electric field C. The surface makes an angle of 45° with the electric field D. All of the above
8	If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be	A. 5μF B. 20μF C. 10μF D. 15μF
9	The electric field will be uniform	A. Near a positive point charge B. Near a negative point charge C. Between two oppositely charged parallel metal plates D. None of above
10	In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called	A. Time constant B. Decay constant C. None of these D. All of 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 SI unit of current is

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

Current provided by a battery is maximum when

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

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 unit of conductance is

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

The electric flux from a closed surface

The capacitance of a parallel plate capacitor depends upon

The charge carriers in gases are

The electric field will be uniform

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

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

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

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

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

A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes

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

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

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

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

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

Potentiometer is more sensitive than voltmeter, because

The minimum charge on any object can not be less than

The speed of randomly moving electrons depends upon

Electric flux is defined by the relation

Which of the following does not obey ohm's law?

The SI unit of capacitance is

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ECAT Physics Chapter 12 Important MCQ's

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

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

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

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