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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACAC current and voltageEasy2 minPYQ_2020

PhysicsEasysingle choice

The time required for a $50 H z$ alternating current to increase from $0$ to $70.7 %$ of its peak value is

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Answer:

Solution:

We know that $i = i_{0} \sin ω t$

$i = i_{0} \sin (100 π t)$

$0.707 i = i_{0} \sin (100 π t)$

$\frac{1}{\sqrt{2}} = \sin (100 π t)$

$\frac{π}{4} = 100 π t$

$t = \frac{1}{400}$

$t = 2.5 m s$

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

⏱ 2mℹ️ Source: PYQ_2020

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