Consider two circuits, (A) and (B), each having two resistors. One of them has a positive temperature coefficient of resistance, +α, while the other one has a negative temperature of coefficient, −α,

Question

Consider two circuits, (A) and (B), each having two resistors. One of them has a positive temperature coefficient of resistance, +α, while the other one has a negative temperature of coefficient, −α, as shown in the figure. The current through these circuits are denoted by IA and IB. At initial temp

Accepted Answer

Answer: IA remains constant while IB increases — RA = R₁ + R₂ = R₀(1 + αΔT) + R₀(1 − αΔT) = 2R₀ IA = V/RA = V/2R₀ does not depends on temperature RB = R₁R₂/(R₁ + R₂) = R₀²(1 + αΔt)(1 − αΔt) / [R₀(1 + αΔt) + R₀(1 − αΔt)] = R₀²(1 − α²Δt²)/2R₀ RB = R₀/

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