45. A ball is thrown vertically upward. It has a speed of 10 m/sec when it has reached one half of its maximum height. How high does the ball rise? Take g = 10 m/s2.

94. Which gate is represented by the following truth table ?

 

21. The intrinsic semiconductor becomes an insulator at ___ ?

20. An alternating current can be converted into direct current by a ____ ?

32. In a parallel plate capacitor, the distance between the plates is d and potential difference across the plates is V. Energy stored per unit volume between the plates of capacitor is ?

31. The capacity of a parallel plate condenser is 10μF when the distance between its plates is 8 cm. If the distance between the plates is reduced to 4 cm then the capacity of this parallel plate condenser will be ?

30. Energy stored in a capacitor is ?

36. A charge QμC is placed at the centre of a cube, the flux coming out from any surface will be ?

21. The electric intensity due to a dipole of length 10 cm and having a charge of 500μC, at a point on the axis at a distance 20 cm from one of the charges in air, is ?

20. If a dipole of dipole moment p is placed in a uniform electric field E, then torque acting on it is given by ?