EASY
12th ICSE
IMPORTANT
Earn 100

Distinguish between ‘average value’ and ‘rms value’ of an alternating current.

Important Questions on Alternating Current

EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 2
An ordinary moving-coil ammeter used for DC cannot be used to measure AC even if its frequency is low. Why?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 3
Does alternating current show magnetic effect? If alternating current is flowing in a wire, will there be a deflection in a magnetic needle placed nearby?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 4
How will you detect with the help of a powerful magnet that the current flowing in a lamp is alternating or direct?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 5
Why is it not possible to have electrolysis by AC?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 6
Explain why batteries cannot be charged by AC.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 7
What is the phase relation between current and voltage in (i) a resistor,?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 7
What is the phase relation between current and voltage in(ii) an inductor ?
MEDIUM
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 12 - Alternating Current>QUESTIONS>Q 7
What is the phase relation between current and voltage in (iii) a capacitor in AC circuits?