a 30 v ,90w lamp is to be operated on a 120 v dc lines.for proper glow,how much resistance should be connected in series with the lamp?

Open in App

Solution

Suggest Corrections

Similar questions

Q. A

30 V, 90 W

lamp is to be operated on a

120 V D C

line. For proper glow, a resistor of ..... should be connected in series with the lamp.

Q. A 30V-90W lamp is operated on a 120 V DC line. A resistor is connected in series with the lamp in order to glow it properly. The value of resistance is

Q. A lamp of 6 V and 30 W is used in a laboratory but the supply is of 120 V. what will be done to make use of the lamp?
(1) A resistance may be used
(2) A resistance may be used in series with lamp.
(3) The resistance should be of 18

Ω

How should the several electric lamps be connected with the mains so that the switching on or off a lamp has no effect on the operation of other lamps?

Q. A

20

volt

5

watt lamp 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?

Join BYJU'S Learning Program