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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical PowerEasy2 minQB

PhysicsEasynumerical

A resistor develops $300 J$ of thermal energy in $15 s$ , when a current of $2 A$ is passed through it. If the current increases to $3 A$ , the energy developed in $10 s$ is _____ $J$ .

Answer:

450.00

Solution:

Energy produced is given by $H = i^{2} Rt$

When $i = 2 A, t = 15 s$ , energy is $H = 300 = 2^{2} \times R \times 15$

Resistance is $R = 5Ω$

When $i = 3 A, t = 10 s$ .

Energy is $H^{^{'}} = 3^{2} \times 5 \times 10$ $= 450 J$

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Electrical Power

⏱ 2mℹ️ Source: QB

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