Author Question: When an external resistor of resistance R1 = 14 is connected across the terminals of a battery, ... (Read 52 times)

Chloeellawright · **on:** Jul 29, 2018

When an external resistor of resistance R1 = 14 is connected across the terminals of a battery, there is a current of 6.0 A through the resistor.

When a different external resistor of resistance R2 = 64.4 is connected instead, the current is 2.0 A. Calculate (a) the emf of the battery and (b) the internal resistance of the battery.

Question 2

During each cycle of operation, a refrigerator absorbs 230 J of energy from the freezer and expels 356 J of energy to the room. How much work input is required in each cycle?

A) 712 J
B) 586 J
C) 460 J
D) 126 J