Consider the following statements (A) and (B) and identify the correct answer. Statement I (A): A zener diode is connected in reverse bias, when used as a voltage regulator. Statement I (B): The potential barrier of p-n junction lies between 0.1 V to 0.3 V.

(A) is correct and (B) is incorrect.

(A) is incorrect but (B) is correct.

Two satellites of Earth, S 1 and S 2 , are moving in the same orbit. The mass of S 1 is four times the mass of S 2 . Which of the following statements is true?

The time period of S 1 is four times that of S 2 .

The potential energy of Earth and satellite in both the cases is the same.

S 1 and S 2 are moving with the same speed.

The kinetic energies of the two satellites are equal.

The time period of an earth satellite in circular orbit is independent of

Both the mass of satellite and radius of the orbit

Neither the mass of satellite nor the radius of its orbit

A black body of temperature T is inside a chamber of temperature T 0 . Now the closed chamber is slightly opened to the sun such that the temperature of black body (T) and chamber (T 0 ) remains constant. Then,

Black body will absorb more radiation

Black body will absorb less radiation

Black body will emit more energy

Black body will emit energy equal to energy absorbed by it

Following graph is showing the variation of potential energy between a pair of nucleons as a function of their separation. Indicate the regions A and B.

A - Repulsive Force B - Attractive Force

Directions: In the following question, two statements are given. One is assertion and the other is reason. Examine the statements carefully and mark the correct option. Assertion (A): Kinetic energy is zero to move a positive test charge from infinity to the particular point against the electrostatic force due to the electric field. Reason (R): Kinetic energy is directly proportional to the mass, that's why kinetic energy is zero for test charge.

Both A and R are true and R is the correct explanation of A.

Both A and R are true, but R is not the correct explanation of A.

A is false and R is also false.

Which of the following is not an assumption of kinetic theory of gases?

The volume occupied by the molecules of the gas is negligible in comparison to the volume of the container

Intermolecular force of attraction/repulsion between the molecules is negligible

All molecules of a gas move with equal speed

The collision between the molecules with the wall of container are elastic

Assertion (A): Classical Physics mainly includes subjects like Mechanics, Electrodynamics, Optics and Thermodynamics. Reason (R): The macroscopic domain includes phenomena at the laboratory, terrestrial and astronomical scales.

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

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