Which of the following is an essential physical property of the wires uses for making fuses ?
A 40W instrument has a resistance 90 Ohms. On what voltage should it be operated normally
Mercury which is spilled onto a glass surface forms ball-like shapes because____.
Water of mass 150g at 60\(^o\)c is added to 300g of water at 20\(^o\)c and the mixture is well stirred. Calculate the temperature of the mixture.(neglect heat losses to the surroundings)
Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules.
