A projector lamp can be used at a maximum voltage of 60V ,its resistance is `20Omega` ,the series resistance (in ohm) required to operate the lamp from a 75V supply is ............

A lamp of 600W-240V is connected to 220 V mains. Its resistance is

A maximum current point 0.5mA can be passed through a galvanometer of resistance 20Omega . The resistance to be connected in series to convert it in the voltmeter of range 0-5V is

Calculate ( a) resistance or (b) inductance required in series to operate a lamp (60V,1OW) from asourceof(I00V, 50 Hz)

A 20 watt electric lamp can be operated at a 50 V DC supply . Calculate the value of capacitance of the capacitor required to run the given lamp at 220 V , 50 Hz AC supply .

A galvanometer of resistance G can be converted into a voltmeter of range theta-V volts by connecting a resistance R in series with it. How much resistance will be required to change its range from 0 to V//2 ?

A voltmeter has a resistance of G ohm and range of V volt. The value of resistance used in series to convert it into voltmeter of range in volt is

Out of 60 W and 40 W lamps, which one has a higher electrical resistance when in use ?