Frequency Of Ac Flashcards
1
Q
What is alternating current
A
Current which varies in magnitude and direction periodically
2
Q
Frequency of ac
A
Number of cycles generated per second
3
Q
Unit of frequency
A
Hertz
4
Q
Period of AC
A
Time taken to generate one full cycle
5
Q
How period and frequency of ac are related?
A
Inversely
6
Q
Wht is frequency of ac for domestic purposes
A
50Hz
7
Q
What is resonance
A
Matching; when the frequency of AC source matches with the frequency of the vibrating string
8
Q
Wht is sonometer
A
Is a device which works on principle of resonance
9
Q
Principle of sonometer
A
Resonance
10
Q
Wht is electromagnet
A
Device that gets magnetized when current flows through it
11
Q
Wht is resonating length
A
Dist btw two bridges when resonamce takes place
