How to calculate ammeter and voltmeter readings?
Circuit a: Voltmeter reads 1.5V, Ammeter reads 7.5A
Circuit b: Voltmeter reads 7.5V, Ammeter read 1.5A
Both batteries are in series so total valtage is 15V
Circuit sries restnace is 2 ohms
So Current I=
Voltage drop across top 1 ohm resistors =
So Voltmeter reads +7.5 -6 V ==+1.5V
The 9V and 6 V sources oppose, so resultant voltage is only 3V instead of 15V.
Repeat above calculations.