a) Define electric current in terms of the charge passing through a conductor.-In Figure 2, A, B and C are resistors of values 4, 2 and 5 kQ respectively. D and E are resistorsof value 4 kQ each, F is a resistor of value 7 kQ. G is a cell of voltage 50V. Calculate:-(i)The total resistance of the circuit.-(i)The current /1.-(ii)The currents /2 and I3.-c) In Figure 2, resistors A and D consist of nickel wire which has a temperature coefficient of0.005866 (°C1) at 20°C. Assuming the entire circuit to be initially at 20°C, calculate the resistances of resistors A and D when they are both heated to 200°C. What will be the current Iin this case? Assume all other resistors remain at 20°C.marks][7

Mechanics(Physics)

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