Advertisements
Advertisements
प्रश्न
An Electric bulb is marked 100 W, 230 V. What how long would this lamp take to consume one unit of electricity?
Advertisements
उत्तर
Energy consumed in kWh = `("W" xx "Time in hour")/1000`
`= (100 xx "t"("in hr"))/1000`
If energy consumed in 1 kWh, then 1 = `(100 xx "t")/1000`
time required for consuming 1 kWh, t = 10 hour.
APPEARS IN
संबंधित प्रश्न
Which one has a higher electrical resistance : a 100 watt bulb or a 60 watt bulb?
The diagram below shows a circuit containing a lamp L, a voltmeter and an ammeter,. The voltmeter reading 3 V and the ammeter reading is 0.5 A.
What is the resistance of the lamp?
What is the power of the lamp?
Distinguish between kilowatt and kilowatt-hour.
The diagram 31 shows a 3 terminal plug socket.
(i) What is the purpose of the terminal E?
(ii) To which part of the appliance is the terminal E connected?
(iii) To which wire L or N, is the fuse connected and why?
An electric bulb of resistance 500 Ω draws current 0.4 A from the source. Calculate:
- the power of bulb and
- the potential difference at its end.
Name two common material used for heating elements.
If the rating of an electric bulb is 100W – 230V, Explain its meaning.
A consumer uses 4 lamps of 60 watt, 2 lamps of 40 watt, and 2 lamps of 100 watt. All these are used for 6 hour daily. Find the total bill for 30 days when the rate of energy is 75 paise per unit and the meter rent is Rs. 1.
The unit of e.m.f. of a cell is ____________.
A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V Write Yes or No. Give supporting calculations to justify your answer.
