Which among the following thermometers is preferred for measuring temperature around 1250°C?
One light year is equal to
The resistance of a wire that must be placed parallel with a 12 Ω resistance to obtain a combined resistance of 4 Ω is
Non-conductors, whose polarization is caused by an electric field, are known as
Which one of the following chemicals is used in beauty parlours for hair-setting?
Two elements gallium and oxygen combine to form a compound Ga2O3. Which among the following is the valency of gallium?