Current Electricity: RE-NEET 2026

Medium· Electrical Resistance in Conductors (Temperature Dependence of Resistance & Resistivity)· +4 / −1

Consider two circuits, (A) and (B), each having two resistors. One of them has a positive temperature coefficient of resistance,

+\alpha

, while the other one has a negative temperature of coefficient,

-\alpha

, as shown in the figure. The current through these circuits are denoted by

I_A

and

I_B

. At initial temperature, the resistance of the two resistors is

R_0

. As the temperature is increased, the correct option that describes the variation of current in these circuits is: Figure: in circuit (A) the two resistors

R_0(1 - \alpha\Delta T)

and

R_0(1 + \alpha\Delta T)

are connected in series with the battery

V

. In circuit (B) the same two resistors are connected in parallel across the battery

V

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Current Electricity: RE-NEET 2026

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