An e.m.f. E = 150 cos 314t volts is applied to a purely resistive branch having R= 30 ohms. Find out expressions for current and power as a function of time. Also calculate the frequencies of current and power variations.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. Given:
Current as a function of time
For a purely resistive circuit: 
Current: 
Power as a function of time
Using identity: 
Power: 
Frequencies
Given: 
Current frequency 
Power frequency 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The power is transmitted from a power house on high voltage ac because
The potential difference V and the current i flowing through an instrument in an ac circuit of freq…
In an ac circuit, V and I are given by volts, . The power dissipated in circuit is
Alternating current cannot be measured by dc ammeter because
In an ac circuit, peak value of voltage is 423 volts. Its effective voltage is
In an ac circuit . The time required for the current to achieve its peak value will be