Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityEquivalent ResistanceEasy2 minPYQ_2020

PhysicsEasysingle choice

When the resistance wire is passed through a die the cross-section area decreases by $1 %$ , the change in resistance of the wire is

Answer:

Solution:

Resistance of a wire is

$R = \frac{ρl}{A}$

$\frac{ΔR}{R} = \frac{Δl}{l} - \frac{ΔA}{A} = 1 - (- 1) = 2 %$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: PYQ_2020

Loading discussions...