The pitch of a screw jack is 0.45cm and the arm is 60cm long. If the efficiency of the Jack is 75/π %, calculate the mechanical advantage.

When the downward current flows in a straight vertical conductor, the direction of its magnetic field at a point due north of the wire is?

Aluminium is sometimes used as the leaf of an electroscope because it

The diagram above represents the stress-strain graph of a loaded wire. Which of these statements is correct?

A supply of 400V is connected across capacitors of 3μf and 6μf in series. Calculate the charge