If the voltage of 0.4v is applied across Ge diode it will act as

If an alternating voltage is applied across a diode in series with a load, then

If a wire of resistance 20 Omega is covered with ice and a voltage of 210 V is applied across the wire , then the rate of melting of ice is

If a voltage V is applied across the bulbs in series, then

If reversible voltage of 200 V is applied across an inductor, current in it reduces from 0.25A to 0A in 0.025 ms. Find inductance of inductor (in mH).