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	Resistor is a device which convert electric energy to	A. Heat energy B. Chemical energy C. Elastic energy D. All of the above
2	Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then	A. R₁= 2R₂ B. R₂= 2R₁ C. R₂=4R₁ D. R₁= 4R₂
3	The electric intensity outside the two oppositely charged parallel metal plates is	A. Maximum B. Minimum C. Zero D. Infinite
4	The conductivity of a superconductor is	A. Infinite B. Very large C. Very small D. Zero
5	Heating effect caused by an electric circuit is written	A. H = I²Rt B. H = I²R C. H = IR²t D. H = IR²
6	Battery is charged in motor cars, which is based on	A. Chemical effect B. Magnetic effect C. Electric effect D. None
7	A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be	A. 64 W B. 80 W C. 100 W D. 125 W
8	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	A. 3.9 B. 4 C. 4.2 D. 6
9		A. 5μF B. 10μF C. 3μF D. 6μF
10	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

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

The potential difference across each resistance in series combination is

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

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

What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?

The liquid which conduct current is known as

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 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

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

Potentiometer is more sensitive than voltmeter, because

Electric flux is defined by the relation

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

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

The electric field intensity at a point due to a point charge

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

The unit of conductance is

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

The fractional change in resistance per kelvin is known as

A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance

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

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved

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

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

A point charge A of charge +4μC and another B of charge -1μC are placed in air at a distance 1 m apart. Then the distance of the point on the line joining the charge B, where the resultant electric field is zero, is (in m)

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

The electric flux from a closed surface

The SI unit of electric field intensity is

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

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

What is the current is a 2 x 10⁶ohm resistor having a potential difference of 2 x 10³volts?

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

Two electric bulbs of 200 W and 100 W have same voltage. If R₁and R₂be their resistance respectively then

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

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

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved