Two electric bulbs have tungsten filaments of the same length. If one of them is rated 60 watt and the other 100 watt then which one has thicker filament wire?

Two similar vehicles are moving with the same velocity on the road such that one of them is loaded and the other one is empty. Which of the two vehicles will require larger force to stop it? Give reasons?

Two wires of equal lengths, one of copper and the other of manganin, have the same resistance. Which wire is thicker?

Two wires of equal lengths, one of copper and the other of manganin, have the same resistance. Which wire is thicker?

Two spheres of the same radii, one solid and other hollow are charged to the same potential, which one has greater charge?

Out of two bulbs marked 25 W and 100 W which one has higher resistance?

Can wo electric bulbs, point-like and having filaments of the same material placed close together, produce interference? Explain.

Two heating coils, one of fine wire and the other of thick wire of the same material and of the same length are connected in series and in parallel. Which of the following statement is correct ?

A wire of length 28 m is to be cut into two pieces, one of the pieces is to be made into a square and the other into a circle. What should be the length ·of two pieces so that the combined area of the square and the circle is minimum ?