Electrical Engineering - Alternating Current and Voltage - Discussion
Discussion Forum : Alternating Current and Voltage - General Questions (Q.No. 21)
21.
A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of
0.0045 s
2 ms
1.5 ms
3,000 
s
sDiscussion:
7 comments Page 1 of 1.
N Regmi said:
4 years ago
Why not 1.5 ms; as it is the smallest time period in option? Please explain.
Anand said:
8 years ago
It's very Simple. Smaller the time period is fast changing and vice versa. Here Option A is 4.5mA which is the larger time period from given options comparing with 4mA. So Option A is the correct answer.
Manju said:
8 years ago
Correct explanation @Siddharth.
Puja said:
9 years ago
How A is correct? Please explain me.
(1)
Ewatomi said:
9 years ago
I think Option A is correct.
SIDDHARTH CHATSE said:
9 years ago
Smaller the time period is fast changing.
Arundeep Singh said:
1 decade ago
f=1/t So except option A all are bigger then 4 ms.
Lets see 1/4ms = 1000/4 = 250.
A = 1/0.0045 = 222. 22.
B = 1000/2 = 500.
C = 1000/1.5 = 666.66.
D = 1000000/3000= 333.33.
So clearly option is A.
Lets see 1/4ms = 1000/4 = 250.
A = 1/0.0045 = 222. 22.
B = 1000/2 = 500.
C = 1000/1.5 = 666.66.
D = 1000000/3000= 333.33.
So clearly option is A.
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