A 1.5 V cell sends a charge of 5 C round a circuit in 4 s.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A cell sends a charge of round a circuit in . How much energy does the cell give to the charge, and what is the current?
Need a reminder? The key ideaShow
The potential difference is the work done per coulomb: , in volts (). So . An ammeter goes in series; a voltmeter goes in parallel.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The energy. .
Step 2. The current. .
Answer: , and .
Check. Each coulomb gets , so gets .
Discussion (0)
Log in to join the discussion.
Loading…