Copper wire metals and burns out when the current increases above _________

Statement I: The drift velocity of free electrons is v_d when a current l passes through a copper wire. The drift velocity is halved when the same current passes through another copper wire of double the diameter. Statement II: For the same current, the drift velocity of free electrons in a metal wire is inversely proportional to the area of cross section of the wire.

A compass needle is placed near a current - carrying straight wire . State your observation when the current in the wire is increased . Give reason .

Shown in the figure . Find out the current in the wire BD

The metal that burns with a dazzling light when burnt in oxygen:

What constitutes current in a metal wire ?

Assertion: When we increase the temperature of a metal wire then its electrical resistance increases. Reason: When we increase the temperature of a conductor then its relaxation time also increases.

A conductor loop is held above a current carrying wire 'PQ' as shown in figure. Depict the direction of the current induced in the loop when the current in the wire PQ is constanly increasing.

A conducting loop is held above a current carrying wire PQ as shown in the figure. Depict the direction of the current induced in the loop when the current in the wire PQ is constantly increasing.

The temperature of a metal wire rises when an electric current passes through it because :