Question

series and parallel circuits

1. v =

1.5 v cells

1. v =

1.5 v cells

1. v =

1.5 v cells

1. v =

1.5 v cells

1. which circuit will have brighter lights?

1. which circuit will have brighter lights?

1. which circuit will have brighter lights?

1. which circuit will have brighter lights?

1. which ammeter would have the highest current ?

a

b

c

Explanation:

Step1: Calculate series cell voltage

Count cells: 5 cells, each 1.5 V.
$V = 5 \times 1.5 = 7.5$ V

Step2: Calculate parallel cell voltage

Parallel cells have equal voltage.
$V = 1.5$ V

Step3: Calculate parallel cell voltage

Parallel cells have equal voltage.
$V = 1.5$ V

Step4: Calculate combined series-parallel voltage

Each parallel pair = 1.5 V, 2 pairs in series.
$V = 1.5 + 1.5 = 3.0$ V

Step5: Compare circuit brightness

Right circuit: bulbs in parallel have full voltage; left bulbs in series split voltage. Brighter: right circuit.

Step6: Compare circuit brightness

Right circuit: 3 cells in series = 4.5 V; left parallel cells = 1.5 V. Brighter: right circuit.

Step7: Compare circuit brightness

Left circuit: 2 cells in series = 3.0 V; right parallel cells = 1.5 V. Brighter: left circuit.

Step8: Compare circuit brightness

Both circuits have 2 series cells (3.0 V) and same bulb setup. Brightness: both equal.

Step9: Compare ammeter current

Circuit A: ammeter measures total current of 2 parallel bulbs (highest total current); B measures 1 bulb, C measures total of 1 bulb. Highest current: Circuit A.

Answer:

1. 7.5 V
2. 1.5 V
3. 1.5 V
4. 3.0 V
5. The right circuit (bulbs in parallel with one cell)
6. The right circuit (three cells in series with one bulb)
7. The left circuit (two cells in series with two bulbs in series)
8. Both circuits have equally bright lights
9. Circuit A