I'm stumped on what formula to use for the following question.
A 1.5V battery does 4.5*10^2 J of work in 120s.
Calculate the current through the battery
Calculate the number of elementary charges that pass through the battery.
I've been trying to figure out the formula to start with and would really appreciate some help.
volts = joules/coulomb and
coulomb = amp*sec so
volts = joules/amp*sec.
So I solve for a=J/v*s to get the current (4.5*10^2/1.5*120). I hope I got this right and thanks very much.
Your formula will give you the number of Amperes of current. Divide that by the electron charge (1.6*10^-19 Coulombs) to get the rate that electrons pass through. Multiply that by 120s for the number of electrons.
Thanks!
To solve these questions, you'll need to use Ohm's Law and the relationship between electrical work and charge.
1. To calculate the current through the battery (I), you can use Ohm's Law: I = V/R, where V is the battery voltage and R is the total resistance in the circuit. However, in this case, only the battery voltage (1.5V) is given. So, you need additional information to determine the current. Do you have any information about the resistance in the circuit?
2. To calculate the number of elementary charges that pass through the battery, you'll need to use the relationship between electrical work and charge. The formula is: Work = Q * V, where Work is the electrical work done (given as 4.5*10^2 J), Q is the charge, and V is the voltage. Rearranging the formula, you get Q = Work / V. Using this formula, you can calculate the number of elementary charges that pass through the battery by dividing the given electrical work by the battery voltage.
Please let me know if you have any additional information or if you need further assistance with these calculations.