A 20 watt, 50 V lamp is connected in series to a.c. mains of 250 V, 50 Hz. Calculate to value of capacitor to run the lamp.

A 20 watt, 50 volt filament is connected in series to an a.c. mains of 250 volt - 50 hertz. Calculate the value of the capacitor required to run the lamp.

A 20 volts 5 watt Jamp is used on a.c. mains of 200 volts 50 c.p.s. Calculate the value of (a) capacitance, (b) inductance to be put in series to run the lamp. (c) how much pure resistance should be included in place of the above device so that lamp can run on its voltage

Two lamps A rated 100 watt 220 V and B rated 60 watt 220 V are connected in series to electric main supply of 220 V. the ratio of heat produced in lamp A to the lamp B would be

A 25 watt lamp is connected to a.c. potential of peak value 100 V. Calculate the r.m.s. value of the current.

A 50 W, 100V lamp is to be connected to an ac mains of 200V, 50 Hz. What capacitor is essential to be put in series with the lamp?

A 50 W, 100V lamp is to be connected to an ac mains of 200V, 50 Hz. What capacitor is essential to be put in series with the lamp?

A capacitor of 20 muF is connected in series with a 25 Omega resistance to peak e.m.f. 240 V, 50 Hz A.C. Calculate:-the capacitive reactance of the coil