KVPY Stream-SA (Class 11) Physics: Questions 25 - 27 of 252

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 252 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

Question number: 25

» Kinetic Theory of Gases » Kinetic Theory of Gases

Appeared in Year: 2011

MCQ▾

Question

The number of air molecules in a (5m × 5m × 4m) room at standard temperature and pressure is of the order of

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 26

» Properties of Solids & Liquids » Specific Heat Capacity

Appeared in Year: 2010

MCQ▾

Question

Two identical blocks of metal are at 20ºC and 80ºC respectively. The specific heat of the material of the two blocks increases with temperature. Which of the following is true about the final temperature T f when the two blocks are brought into contact? (Assuming that no heat is lost to the surroundings)

Choices

Choice (4) Response

a.

T f will be more than 50ºC

b.

T f will be less than 50ºC

c.

T f will be 50ºC

d.

T f can be either more than or less than 50ºC depending on the precise variation of the specific heat with temperature

Question number: 27

» Electrostatics » Forces Between Two Point Charges

Appeared in Year: 2010

MCQ▾

Question

positive charges of magnitude q are placed on a circle of radius R in a manner that they are equally spaced. A charge Q is placed at the center. If one of the charges q is removed, then the force on Q is

Choices

Choice (4) Response

a.

Equation away from the position of the removed charge

b.

Equation away from the position of the removed charge

c.

Equation towards the position of the removed charge

d.

Zero

f Page
Sign In