Mixed

The S.I. Unit of Resistivity is

Ina right angled triangle ABC, the angle A is 90°. What is the value of secB, if BC is 5 cm and AB is 3 cm.

The length ofa board is 12 cm and its breadth is 3 cm. The board needs to be taped around its sides covering all four 81065. How long the tape should be?

Form the quadratic equation whose roots are 3 and 4

A bullet of mass 20 gm is fired from a riffle of mass 8 kg with a velocity of 100 m/s. The velocity of recoil of the rifle is

A body is thrown with a velocity 20 m/s at an angle of 30° with the horizontal. The time taken to reach the maximum height is ( Take g = 10 m/s”)

When a current carrying conductor is kept in a magnetic field, it experiences a force. The direction of this force depends Q on which of the following? (a) The direction of current through the conductor (b) The direction of the magnetic field in which the conductor is placed (c) Both (a) and (b) (d) Neither (a) nor (b)

Which of the following can be produced during nuclear fission and nuclear fusion?

Sum of first 25 terms in the following series would be T, [LSS2S, :

Astone placed at the bottom of water tank appears raised by 80 cm. If refractive index of water is 4/3, The actual depth of water in tank.