It is safe to touch a live wire .

State whether the following statement are true or false : The wire with green insulation is usually the live wire of an electric a supply .

The acceleration due to gravity on a planet is 1.96 ms^(-1) . If it is safe to jump from a height of 2 m on the earth, what will be the corresponding safe height on the planet?

A cylindrical bar magnet is rotated about its axis as in figure. A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then

What are the potentials of the live and neutral wires used in our country ? What is the potentical difference between these wires ?

State value of potential difference between the live wire and neutral wire of power supply in our country .

Two copper wires A and B have the same mass. The resistance of wire A is 0.5 Omega and the length of wire B is double that of wire A. Find the resistance of wire B.

For two wires of the same material and having the same length, the resistance of the thicker wire is less than that of the other wire ?

You are given aluminium wire and copper Wire having the same dimensions. Which wire will carry more electric current if the applied potential difference is the same for the two wires?

A planet of radius R=(1)/(10)xx(radius of Earth) has the same mass density as Earth. Scientists dig a well of depth (R )/(5) on it and lower a wire of the same length and a linear mass density 10^(-3) kg m(_1) into it. If the wire is not touching anywhere, the force applied at the top of the wire by a person holding it inplace is (take the radius of Earth =6xx10^6m and the acceleration due to gravity on Earth is 10ms^(-2)