Moderate

A wire of resistance 16 Ω is cut into four equal parts, and two parts are connected in parallel. The equivalent resistance is:

Correct answer: A.

  • A.
  • B.
  • C.
  • D. 16Ω

Explanation

Each part has resistance 16/4 = 4 Ω. Two parts in parallel: 1/Req = 1/4 + 1/4 = 2/4, so Req= 4/2 = 2 Ω.

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Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.

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