Test Preparation on Heating and Chemical Effect of Current- Physics Test Series IIT JEE-2020
1.
A heater coil is cut into two parts of equal length and one of them is used in the heater. The ratio of the heat produced by this half coil to that by the original coil is
2.
3.
An electric bulb is rated 220 volt and 100 watt. Power consumed by it when operated on 110 volt is