Two resistors having equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval
Equal amounts of thermal energy must be produced in the resistors
Unequal amounts of thermal energy may be produced
The temperature must rise equally in the resistors
The temperature must rise unequally in the resistors
The current flowing through a lamp marked as $50\, W$ and $250\, V$ is ............. $amp$
Three identical resistors $R_1=R_2=R_3$ are connected as shown to a battery of constant e.m.f. The power dissipated is ...........
A house is served by $220\, V$ supply line in a circuit protected by a $9\, ampere$ fuse. The maximum number of $60\, W$ lamps in parallel that can be turned on, is
If a high power heater is connected to electric mains, then the bulbs in the house become dim, because there is a
Three identical bulbs $B_1, B_2$ and $B_3$ are connected to the mains as shown in figure. If $B_3$ is disconnected from the circuit by opening switch $S$, then incandescence of bulb $B_1$ will