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Physics Electricity CBSE Board 2026 Medium

(i) State Ohm’s law. (ii) Derive an expression for equivalent resistance of parallel combination of three res…

  1. (i)State Ohm’s law.
  2. (ii)Derive an expression for equivalent resistance of parallel combination of three resistors having resistances , and .
  3. (iii)V-I graph is given for two wires having identical shapes and sizes, but made of two different materials A and B. Out of A and B, which one is a better choice for making a heating element ? Justify your answer.
B A Potential difference (V) Current I (A)

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