Physics · PYQ NEET UG 2026

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 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 :

1. A
   ( I_A ) remains constant while ( I_B ) increases
2. B
   ( I_A ) decreases while ( I_B ) increases
3. C
   ( I_A ) increases while ( I_B ) decreases
4. D
   both ( I_A ) and ( I_B ) remain constant