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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACAC current and voltageMedium2 minPYQ_2023

PhysicsMediumsingle choice

What direct current will produce the same amount of thermal energy in a resistance $R =$ $2Ω$ as an alternating current that a peak value of $4.24 A$ and frequency $50 Hz$ ?

Options:

Answer:

Solution:

Peak current, $I_{0} = 4.24 A$ $I_{rms} = \frac{I _{0}}{2} = (\frac{4.24}{2})$ Thermal energy produced, $H = I_{d}^{2} RT = I_{rms}^{2} RT I_{d} = I_{rms}^{2}$ Direct current, $I_{d} = (\frac{4.24}{2})^{2} = \frac{4.24}{2} = 2.99 A ≃ 3 A$

Stream:VITEEESubject:PhysicsTopic:EMI/ACSubtopic:AC current and voltage

⏱ 2mℹ️ Source: PYQ_2023

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