The switch in the circuit has been closed for a long time. It is opened at t = 0. At t = 0⁺, the current through the 1μF capacitor is

If the electrical circuit of figure (b) is an equivalent of the coupled tank system of figure (a), then

An ammeter has a current range of $$0$$-$$5A,$$ and its internal resistance is $$0.2\Omega $$. In order to change the range to $$0$$-$$25$$ $$A$$ we need to add a resistance of

A wattmeter is connected as shown in the fig. the wattmeter reads