AC Devices

What is hot wire ammeter?

What is hot wire voltmeter?

For handling greater current induction wattmeter are used in conjunction with________.

The spring material used in a spring control device should have the following property:

_________ instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured?

Alternating currents can be produced by a 

The frequency of AC mains in India is

Consider the L - R circuit shown below and choose the correct statement(s)

Assertion: In the figure, just after closing the switch the potential drop across inductor is maximum.

Reason: The rate of change of current just after closing the switch is maximum.

In an ideal choke, ratio of its inductance $L$ to its DC resistance $R$ is

In a choke coil, the reactance $X_L$ and resistance $R$ are such that

A choke is preferred to a resistance for limiting current in an $AC$ circuit because