Question

*If the three electric bulbs in the circuit are illuminating less than the original, then those bulbs are connected _____ to the electric circuit.*

1️⃣ three bulbs in parallel
2️⃣ three bulbs in series
3️⃣ two bulbs in parallel and one bulb in series
4️⃣ other than these​

Answer 1

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2️⃣ three bulbs in series