Science : Ch 12 – Electricity

W= qV= 20000 × 10 = 2,00, 000 = 2 × 10⁵ J

Three resistors of 2 Ω is required to get 6 Ω because resultant is more than individual so they all must be connected in series.

Ammeter at the times connected in series with in the circuit. The reading is independent from its location.

Q = ne and Q = It∴ ne = It

Current is inversely proportional to the resistance for the same potential. So higher resistance would allow less current to pass through its which is shown by R3 as I3 < I2 < I1∴ R3 >R2 > R1

The gap between conduction band and valence band is much greater than conductors which don't allow them to conduct electricity very easily which in result shows greater resistance, so insulators offer infinitely high resistance.

electrons move from low potential to high potential. Note: So, the end of high potential has more positive charges and the end of the battery with low potential has more negative charges. While the electric current flows from the high potential to the low potential.

Constant temperature makes the resistivity constant which made resistance constant. Constant resistance again made the Ohms law applicable. Thats why Ohms law is applied only at constant temperature. It is like the conditions apply of the law.