5) If i= cos(4t) and y=sin(4t), the element is:
Use the figure provided below for multiple choice 6 and 7...
5) If i= cos(4t) and y=sin(4t), the element is:
a) a resistor
b) a capacitor
c) an inductor
d) a resistor in series with a capacitor
e) a resistor in series with an inductor
6) If i= cos(4t) and v= cos(4t+30°), the element is:
a) a resistor
b) a capacitor
c) an inductor
d) a resistor in series with a capacitor
e) a resistor in series with an inductor
Homework Answers
In inductor voltage leads the
current by 90° . But it is 30° So
Answer is e)
ANSWERS :
5.
Since , cos(x) = sin(x + pi/2).
Hence, current is ahead of voltage by pi/2 . So, it is a capacitor : Option b. (ANSWER).
6.
Current lags voltage by 30º. So, the element is a resistor in series with an inductor : Option e . (ANSWER)
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