Practice portal › Current Electricity › Resistance and Resistivity

Identify the set in which all the three materials are good conductors of electricity.

Asked in CBSE AIPMT 1994 · Resistivity of various materials

Answer: (3) Cu, Ag and Au

Step-by-step solution

Good conductors are metals, with a large density of free electrons.

Cu, Ag and Au are all metals (among the best conductors known).

Each other set contains a semiconductor (Ge, Si), an insulator (diamond) or an ionic solid (NaCl).

Why the other options are wrong

More Resistance and Resistivity questionsAll Resistance and Resistivity questions →

Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.

Practise this with a timer