268378
An electric bulb is rated 220 volt and 100 watt. Power consumed by it when operated on 110 volt is
1 50 watt
2 75 watt
3 90 watt
4 25 watt
Explanation:
\(P=\frac{V^{2}}{R}\)
Current Electricity
268379
A heater coil is cut in to two parts of equal length and only one of them is used in the heater. Theratio of the heat produced by this half-coil to that by the original coil is
268380
If the electric current in a lamp decreases by \(5 \%\) then the power output decreases by
1 \(20 \%\)
2 \(10 \%\)
3 \(5 \%\)
4 \(2.5 \%\)
Explanation:
\(P=i^{2} R \Rightarrow P \alpha i^{2} \Rightarrow \frac{\Delta P}{P} \times 100=2 \times \frac{\Delta I}{I} \times 100\)
Current Electricity
268381
Two electric bulbs whose resistances are in the ratio of \(1: 2\) are connected in parallel to a constant voltage source. The powers dissipated in them have the ratio
268378
An electric bulb is rated 220 volt and 100 watt. Power consumed by it when operated on 110 volt is
1 50 watt
2 75 watt
3 90 watt
4 25 watt
Explanation:
\(P=\frac{V^{2}}{R}\)
Current Electricity
268379
A heater coil is cut in to two parts of equal length and only one of them is used in the heater. Theratio of the heat produced by this half-coil to that by the original coil is
268380
If the electric current in a lamp decreases by \(5 \%\) then the power output decreases by
1 \(20 \%\)
2 \(10 \%\)
3 \(5 \%\)
4 \(2.5 \%\)
Explanation:
\(P=i^{2} R \Rightarrow P \alpha i^{2} \Rightarrow \frac{\Delta P}{P} \times 100=2 \times \frac{\Delta I}{I} \times 100\)
Current Electricity
268381
Two electric bulbs whose resistances are in the ratio of \(1: 2\) are connected in parallel to a constant voltage source. The powers dissipated in them have the ratio
268378
An electric bulb is rated 220 volt and 100 watt. Power consumed by it when operated on 110 volt is
1 50 watt
2 75 watt
3 90 watt
4 25 watt
Explanation:
\(P=\frac{V^{2}}{R}\)
Current Electricity
268379
A heater coil is cut in to two parts of equal length and only one of them is used in the heater. Theratio of the heat produced by this half-coil to that by the original coil is
268380
If the electric current in a lamp decreases by \(5 \%\) then the power output decreases by
1 \(20 \%\)
2 \(10 \%\)
3 \(5 \%\)
4 \(2.5 \%\)
Explanation:
\(P=i^{2} R \Rightarrow P \alpha i^{2} \Rightarrow \frac{\Delta P}{P} \times 100=2 \times \frac{\Delta I}{I} \times 100\)
Current Electricity
268381
Two electric bulbs whose resistances are in the ratio of \(1: 2\) are connected in parallel to a constant voltage source. The powers dissipated in them have the ratio
268378
An electric bulb is rated 220 volt and 100 watt. Power consumed by it when operated on 110 volt is
1 50 watt
2 75 watt
3 90 watt
4 25 watt
Explanation:
\(P=\frac{V^{2}}{R}\)
Current Electricity
268379
A heater coil is cut in to two parts of equal length and only one of them is used in the heater. Theratio of the heat produced by this half-coil to that by the original coil is
268380
If the electric current in a lamp decreases by \(5 \%\) then the power output decreases by
1 \(20 \%\)
2 \(10 \%\)
3 \(5 \%\)
4 \(2.5 \%\)
Explanation:
\(P=i^{2} R \Rightarrow P \alpha i^{2} \Rightarrow \frac{\Delta P}{P} \times 100=2 \times \frac{\Delta I}{I} \times 100\)
Current Electricity
268381
Two electric bulbs whose resistances are in the ratio of \(1: 2\) are connected in parallel to a constant voltage source. The powers dissipated in them have the ratio
