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Friday, 9 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 28 July 2022, Shift 1, Physics Q44

Question 44 of 90 in this shift, Physics question 14 of 30, Section A.

The equation of current in a purely inductive circuit is 5sin⁡(49πt−30∘)5\sin(49\pi t-30^\circ). If the inductance is 30 mH then the equation for the voltage across the inductor, will be : {Let π=227\pi=\frac{22}{7}}
  1. (1)1.47sin⁡(49πt−30∘)1.47\sin(49\pi t-30^\circ)
  2. (2)1.47sin⁡(49πt+60∘)1.47\sin(49\pi t+60^\circ)
  3. (3)23.1sin⁡(49πt−30∘)23.1\sin(49\pi t-30^\circ)
  4. (4)23.1sin⁡(49πt+60∘)23.1\sin(49\pi t+60^\circ)Official answer

Official answer

Option 4

NTA final key (2022 Session 2).

Chapter
Alternating Current
Topic
Phasor Diagrams
Idea tested
Phase Relations in RLC

Same idea in other shifts

Asked 3× in all
  1. 13 Apr 2023, Shift 2 · Q44Given below are two statements: Statement I : An AC circuit undergoes electrical resonance if it contains either a capacitor or an…MediumTwo statements
  2. 9 Jan 2020, Shift 2 · Q15In LC circuit the inductance L=40L = 40 mH and capacitance C=100 μC = 100\ \muF. If a voltage V(t)=10sin⁡(314 t)V(t) = 10\sin(314\,t) is applied to the circuit,…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.