Post-UTME Physics 2017 Objective — Question 17
Question 17 of 20 from the Post-UTME Screening (Post-UTME) Physics 2017 Objective paper, with the correct answer and a full explanation.
Advertisement
Use the diagram above (three capacitors C1, C2 and C3 in series with a 24V battery) to answer this question. In the diagram, three capacitors C1, C2 and C3 are connected in series to a 24V battery. If the capacitances are respectively equal to 2F, 3F and 6F, calculate the potential difference across the capacitor labelled C2.
- A. 12V
- B. 8VCorrect
- C. 6V
- D. 4V
Explanation
Series capacitance: 1/C=1/2+1/3+1/6=1, so C=1F. Charge Q=CV=1x24=24C. V2=Q/C2=24/3=8V.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.