Work done by static friction on a body in an inertial frame:
(A) must be +ve (B) must be -ve(c) must be zero (D) may be-ve

STATEMENT-1 Work done by static friction in any reference frame is zero STATEMENT-2 If work done on the body is positive its kinetic energy increases.

If a chraged particle at rest experiences no electromagnetic force, (i) the electric field must be zero (ii) the magnetic field must be zero (iii) the electric field may or may not be zero (iv) the magnetic field may or may not be zero

Which one of the following conditions is incorrect for a well behaved wave function (psi) (A) psi must be finite (B) psi^(2) must be single valued (C) psi must be infinite (D) psi must be continuous

Assertion: Work done by the force of friction in moving a body around a closed loop is zero. Reason: Work done does not depend upon the nature of force.

How much work must work be done by a force on 50 kg body in order to accelerate it in the direction of force from rest to 20 ms^(-1) is 10 s?

If a charge particle kept at rest experiences an electromagnetic force, (i) the electric field must not be zero (ii) the magnetic field must not be zero (iii) the electric field may or may not be zero (iv) the magnetic field may or may not be zero

In a process on a system, the initial pressure and volume are equal to the final pressure and volume (i) The initial temperature must be equal to the final temperature (ii) The initial internal energy must be equal to the final internal energy (iii) The net heat given to the system in the process must be zero. (iv) The net work done by the sytem in the process must be zero.

Number of ways in which 8people can be arranged in a line if A and B must be next each other and C must be somewhere behind D,is equal to