Discussion
For the given circuit, what is the voltage across the capacitor?
Answer: A
The circuit has a capacitor and a 50 ohm resistor in series on a 12 V supply, with a current of 0.16 A. The voltage across the resistor is 0.16 x 50 = 8 V. In a series RC circuit the supply voltage is the square root of the sum of the squares of the two voltages, so
\[ V_{C} = \sqrt{12^{2} - 8^{2}} = \sqrt{80} \]
\[ V_{C} \approx 8.9\ \mathrm{V} \]
So the voltage across the capacitor is 8.9 V, option (A). The values 18.3 V and 19.2 V are larger than the supply, which cannot be, and 12 V would be the supply voltage itself.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development