At the time of short circuit, the current in the circuit
The essential difference between an AC generator and a DC generator is that
Transformers are used
To convert mechanical energy into electrical energy,one can use
The marching soldiers break steps while crossing a bridge because of
Range of audiofrequencies is
Which of the following statements is incorrect regarding the time period of a simple pendulum oscillating with small amplitude? The time period of the pendulum

Solution
\(T=2\pi \sqrt{\frac{\iota }{g}}\)
If a tunnel is dug along the diameter of earth and a piece of stone is dropped into it, then the stone will
A hollow sphere is filled with water. It is hung bya long thread. As the water flows out of a hole at the bottom, the period of oscillation will

Solution
Time period of simple pendulum T=2\(\pi \sqrt{\left ( \frac{l}{g} \right )}\alpha \sqrt{l}\)
where l is effective length.
[i.e distance between centre of suspension and centre of gravity of bob]
Initially, centre of gravity is at the centre of sphere. When water leaks the centre of gravity goes down until it is half filled; then it begins to go up and finally it again goes at the centre. That is effective length first increases and then decreases. As T\(\alpha \sqrt{l}\), so time period first increases and then decreases.
Resonance is an example of