Question

30. (a) An electric bulb is rated at 200 V; 100 W. What is its resistance ?
(b) Calculate the energy consumed by 3 such bulbs if they glow
continuously for 10 hours for complete month of November.
Calculate the total cost if the rate is * 6.50 per unit.
OR​

Answer 1

Answer:

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Answer 2

Answer:

Explanation:

We know that power=v^2÷r

So r=200×200÷100

And we get resistance as 400ohm

B)power used =3×100×10×30=90000wh

And changing it into kwh then we get 90kwh or 90 units

C) now we multiply 90×6.50=585 rupees