The density of a certain oil on frying becomes 0.4 kgm-3 with the volume of 20m3. what will be its initial volume when its initial density is 0.8 kgm-3 assu...

In Faradays law of electrolysis, a graph of the mass deposited against the quantity of electricity is plotted. The slope of the graph gives

Two metals P and Q are heated through the same temperature difference. If the ratio of the linear expansivities of P to Q is 2:3 and the ratio of their Lengt...

Three capacitors of capacitance 2μF, 4μFand 8μF are connected in parallel and a P.D of 6V is maintained across each capacitor, the total energy stored is

In the diagram above, if the south-poles of two magnets strokes steel bar, the polarities at T and V will respectively be

The radioisotope \( {}^{235}_{92}\mathrm{U} \) decays by emitting two alpha particles, three beta particles and a gamma ray. What is the mass and atomic numb...

A cell of e.m.f 12V and internal resistance 4Ω is connected to an external resistor of resistance 2Ω. Find the current flow.

The diagram above shows a balanced metre bridge, the value of x is

An object is weighted at different locations on the earth. What will be the right observation?