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	Surface density of charge is defined as	A. Charge per unit volume B. Charge per unit length C. Charge per unit area D. Charge per unit mass
2	Which one of the following causes production of heat when current is set up in a wire?	A. Fall of electrons from higher orbits to lower orbits B. Inter-atomic collisions C. Inter-electron collisions D. Collisions of conduction electron with atoms
3	The capacitance of a parallel plate capacitor depends upon	A. Area of the plates B. Separation between the plates C. Medium between the plates D. All of the above
4	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
5	Cause of heat production in a current carrying conductor is	A. Collisions of free electrons with one another B. High drift speed of free electrons C. Collisions of free electrons with atoms or ions of conductor D. High resistance value
6	One electron volt is equal to	A. 1.6 x 1019eV B. 6.25 x 1018 eV C. 1.6 x 1018 eV D. 6.25 x 1019eV
7	A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?	A. Electric potential at the surface of the cube is zero B. Electric potential within the cube is zero C. Electric filed is normal to the surface of the cube D. Electric filed varies within the cube
8	The resistivity of a substance depends upon the	A. length B. mass C. area D. temperature
9	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
10	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	A. 1.92 N B. 19.2 N C. 12 N D. 0.192 N

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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

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

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

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

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

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

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

The SI unit of current is

An electric charge at rest is

A condenser of capacity 50μF is charged to 10 V.The energy stored is

The electric lines of force are

The electric flux is linked with a surface will be maximum when

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

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

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

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

Solar cell converts sunlight directly into

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

Surface density of charge is defined as

The concept of field theory was put forward by

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

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

In a charged capacitor the energy is stored in

The relation between charge 'Q' and current 'I' is given by

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

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

Consider a spherical shell of metal at he centre of which a positive point charge is kept

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?

The electric field will be uniform

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

Battery is charged in motor cars, which is based on

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ECAT Physics Chapter 12 Important MCQ's

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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