1
CBSE 12th Physics Delhi Set 1 - 2023
Subjective
+3
-0
An alternating voltage of $$220 \mathrm{~V}$$ is applied across a device $$X$$. A current of 0.22 A flows in the circuit and it lags behind the applied voltage in phase by $$\pi / 2$$ radian. When the same voltage is applied across another device $$Y$$, the current in the circuit remains the same and it is in phase with the applied voltage.
(i) Name the devices $$X$$ and $$Y$$ and,
(ii) Calculate the current flowing in the circuit when the same voltage is applied across the series combination of $$\mathrm{X}$$ and $$\mathrm{Y}$$.
2
CBSE 12th Physics Delhi Set 1 - 2023
Subjective
+3
-0
State the basic principle behind the working of an ac generator. Briefly describe its working and obtain the expression for the instantaneous value of emf induced.
Questions Asked from Alternating Current (Marks 3)
Number in Brackets after Paper Indicates No. of Questions
Class 12 Subjects
Physics
Electromagnetism
Electrostatics Current Electricity Capacitor Magnetic Effect of Current Magnetic Properties of Matter Electromagnetic Induction Alternating Current Electromagnetic Waves
Optics
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Relations and Functions
Calculus
Continuity and Differentiability Application of Derivatives Indefinite Integration Definite Integration Application of Integration Differential Equations
Algebra