posted by Jon on .
1)A 2.0-V battery is connected in a circuit with an ammeter and an unknown resistor, P. The current is observed to be 0.70 A. What would be the current in the circuit if a 12-V battery replaces the 2.0-V battery?
I got A
2)Which appliance consumes the most power?
A)tv. potential difference = 24 current = 0.75
B)drill. potential difference = 110 current = 1.6
C)bulb. potential difference = 12 current = 4.0
D)amplifier. potential difference = 110 current = 0.2
I got D
right on 1, but on 2) your work makes no sense.
Powerconsumed= V*I you are given v, and current for each .
on 2) i don't understand do I just multiply potential difference and current and find the largest of the bunch?
yes, you are looking for the max power.
for the second one, B is the correct answer.