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# Help needed on applying Kirchhoff's law watch

1. Hi everyone
I'd love some help on question d :

A filament lamp and a 220 ohm resistor are connected in series to a battery of e.m.f. 6.0 V. The battery has negligible internal resistance. A high-resistance voltmeter placed across the resistor measures 1.8 V.

Calculate:

a) the current drawn from the battery (solved)
b) the p.d. across the lamp (solved)
c) the total resistance of the circuit (solved)
d) the number of electrons passing through the battery in a time of 1.0 minute. (The elementary charge is 1.6*10^-19C)
Hi everyone
I'd love some help on question d :

A filament lamp and a 220 ohm resistor are connected in series to a battery of e.m.f. 6.0 V. The battery has negligible internal resistance. A high-resistance voltmeter placed across the resistor measures 1.8 V.

Calculate:

a) the current drawn from the battery (solved)
b) the p.d. across the lamp (solved)
c) the total resistance of the circuit (solved)
d) the number of electrons passing through the battery in a time of 1.0 minute. (The elementary charge is 1.6*10^-19C)
You have, in answer to part a) the current in the battery.

Charge = current x time (From current = charge per second)

You then need to know the charge on one electron to work out how many electrons correspond to that amount of charge.
3. (Original post by Stonebridge)
You have, in answer to part a) the current in the battery.

Charge = current x time (From current = charge per second)

You then need to know the charge on one electron to work out how many electrons correspond to that amount of charge.
Thank you very much!

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Updated: October 9, 2013
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