In the circuit as shown in the figure, the heat produced by $6\, ohm$ resistance due to current flowing in it is $60$ calorie per second. The heat generated across $3\, ohm$ resistance per second will be ................. $calorie$
$30$
$60$
$100$
$120$
How many $60 \,W$ bulbs may be safely run on $220 \,V$ using a $5 \,A$ fuse is .........
Two bulbs of $500\, watt$ and $200\, watt$ are manufactured to operate on $220\, volt$ line. The ratio of heat produced in $500\, W$ and $200\, W$, in two cases, when firstly they are joined in parallel and secondly in series, will be
$A$ constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if
If two wires having resistance $R$ and $2R$. Both joined in series and in parallel then ratio of heat generated in this situation, applying the same voltage,
Assertion : When current through a bulb decreases by $0.5\%$, the glow of bulb decreases by $1\%$.
Reason : Glow (Power) which is directly proportional to square of current.