Class 11th

n mole of perfect gas undergoes a cyclic process ABCA (see figure) consisting of the following processes.

A->B  : Isothermal expansion at temperature T so that the volume is doubled from V₁ to V₂ and Pressure changes from P₁ to P₂.

B->C  : Isobaric compression at pressure P₂ to initial volume V₁.

C->A  : Isobaric change leading to change of pressure from P₂ to P₁.

Total work done in the complete cycle ABCA is:

Rakshit is allowed to select 1 or more books out of (2n + 1) distinct books. If the number of ways in which he may not select all of them is 126, then value of n is __________

What are conservative and non conservative forces?

A circle passes through the points (2, 2) and (9, 9) and touches the x-axis. The absolute value of the difference of possible x-coordinate of the point of contact is __________

Number of ways in which three distinct numbers can be selected between 1 and 20 both inclusive, whose sum is even is __________

Moment of inertia (M.I) of four bodies, having same mass and radius, and reported as:

I₁ = M.I. of thin circular ring about its diameter

I₂ = M.I. of circular disc about an axis perpendicular to disc and going through the centre,

I₃ = M.I. of solid cylinder about its axis and

I₄ = M.I. of solid sphere about its diameter.

What is weightage of Class 11 Physics Chapter 11 Thermodynamics in NEET and JEE Main exams?

If the co-efficient of variation of a distribution is 60 and its standard deviation is 24, then its arithmetic mean is __________

Two stars of masses m and 2m at a distance d rotate about their common  centre of mass in free space. The

If two of the straight lines given by 3x³ + 3x²y – 3xy² + dy³ = 0, are at right angles, then d is equal to __________