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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityMicroscopicHard2 minQB

PhysicsHardmultiple choice

Three metallic bars A, B, and C are arranged as shown in the figure. The number density of free electrons in the three bars are in the ratio

$N_{A} : N_{B} : N_{C} = 1 : 2 : 3$ . The ratio of resistivities of the bars is $ρ_{A} : ρ_{B} : ρ_{C} = 2 : 3 : 1$ . The lengths are in the ratio $l_{A} : l_{B} : l_{C} = 2 : 2 : 3$ , and the radii are in the ratio $r_{A} : r_{B} : r_{C} = 1 : 2 : 3$ as shown. Choose the correct alternative(s).

Options:(select one or more)

Answer:

A, B, D

Solution:

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Microscopic

⏱ 2mℹ️ Source: QB

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