Class 11th

Length v/s temperature graph of A and B is given below. Find the relation between αA & αB.

A capillary glass tube records a rise of 20 cm when dipped in water. When the area of cross- section of the tube is reduced to half of the former value, water will rise to a height of:-

Kindly go through the solution 

Energy required to shift a body of mass m from an orbit of radius 2R to 3R is (mass of planet is M)

When a disc is rolling on level surface the percentage of its total kinetic energy which is translational, is nearly

A flywheel of moment of inertia 3 * 10^–2 kg m² is rotating with angular velocity of 10 rad/sec. The torque (constant) required to bring it rest in 2 sec will be

The stream of a river is flowing with a speed of 2 km/h. A swimmer can swim at a speed of 4 km/h. What should be the direction of the swimmer with respect to the river flow to cross the river perpendicular to river flow ?

A particle is thrown vertically upward. Its velocity at half of the maximum height is 10m/s. The maximum height attained by it is (g=10 ms^–2) :–

If number of divisions on circular scale is 50 in a screw gauge and pitch of screw is 1 mm then find least count of screw gauge.

Assertion (A) Two similarly charged bodies may attract each other.

Reason (R) When charge on one body (Q) is much greater than that on another (q) and they are close enough to each other, then force of attraction between Q and induced charges exceeds the force of repulsion between Q and q.