Question

A lamp draws a 73.1 mA current when connected to a 6 V battery. When a 9 V battery is used, the lamp draws 80 mA. Does the lamp obey Ohm’s law?

Answer 1

NO

Step-by-step explanation:

Ohms law states that the current flowing in a conductor is directly proportional to the voltage across its ends. stated mathematically as V=IR

The constant of proportionality is R.

For the wire to obey ohms law, the Resistance of the wire must stay the same irrespective of the voltage applied and current flowing through it.

`V=IR\\R=(V)/(I)`

lets check R for the two instances.

ist case:

`R=(6)/(0.0731)`

R=82.08Ω

second case:

`R=(9)/(80*10^(-3) )`

R=112.5Ω

The resistance for the first and second cases are not the same. Thus the wire does not obey ohms law.