Physics Past Questions and Answers

In an experiment in which molten naphthalene is allowed to cool, the cooling curve i n the figure was obtained. The temperature 80\(^o\)C is known as the

In the figure, the value of R is

Which of the following instruments consumes the highest current?

I. Electric iron	250v	1kW
II. Television set	220v	110W
III. Torch light	6v	30W
IV. Immersion heater	110v	500W

In which of the following diagrams is the length of the tube equal to one wavelength?

Which of the following pairs is part of the electromagnetic spectrum?
I. Radio waves
II. sound waves
III. Gamma rays
IV. water waves