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प्रश्न
An electric bulb is rated ‘240 V, 100 W’.
- What information can you get from the above statement?
- What will happen if this bulb is connected across 220 V?
- Calculate the resistance of the bulb.
- Also find the energy consumed by the bulb in 10 minutes.
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उत्तर
a. The above statement gives the information that when the electric bulb is put at 240 V of a potential difference it consumes 100 W of power.
b. The bulb will consume less power.
c. R = `"v"^2/"p"`
`= (240 xx 240)/100`
= 576 Ω
d. Electrical energy (kWh) = kW × h
`= 100/100 xx 10/60`
`= 1/60` kWh
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संबंधित प्रश्न
Two copper wires are of the same length, but one is thicker than the other. Which wire will have more resistance?
Name three factors on which resistance of a given wire depends and state how is it affected by the factors stated by you.
Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare their resistances.
Assertion (A): Copper is used to make electric wires.
Reason (R): Copper has very low electrical resistance.
Exercise.
The values of current (I) flowing through a resistor for various potential differences V across the resistor are given below. What is the value of resistor?
| I (ampere) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 |
| V (volt) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
What happens to the resistance, as the conductor is made thicker?
The resistance of a conductor is R. If Its length is doubled, then its new resistance will be ______.
The process of conduction of electric current through the solution is called ______.
Define the following:
Fixed resistor
Define the term resistance.
