Physics
Three bulbs of equal resistance are connected as shown in figure. Out of the following statements which one is correct ?
- The current at B is greater than that at C.
- The current at A equals the current at B.
- The current at C is greater than that at B.
- The current at A equals the current at C.
Current Electricity
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Answer
The current at B is greater than that at C.
Reason — All bulbs have equal resistance then the two bulbs in series at C will have a combined resistance greater than the resistance of bulb B therefore, more current will flow through B than through bulb C and the total current from A splits between B and C. So,
(a) Current at B is greater than C — Correct, because B has lower resistance and gets more current.
(b) Current at A equals current at B — Incorrect, because A splits into B and C, so A's current cannot equal B's current.
(c) Current at C is greater than at B — Incorrect, because C has higher equivalent resistance and hence less current flows through C.
(d) Current at A equals current at C — Incorrect, because A's current splits into B and C.
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