WAEC Physics 2022 Objective — Question 17
Question 17 of 50 from the West African Examinations Council (WAEC) Physics 2022 Objective paper, with the correct answer and a full explanation.
Advertisement
The reason for having a large number of turns in the coil of a moving coil galvanometer is to A. make the deflection of the needle proportional to the current.
- A. increase the sensitivity of the galvanometer
- B. decrease the magnetic flux produced by the magnetCorrect
- C. make the permanent magnet stronger
Explanation
Having a large number of turns in the coil increases the sensitivity of the galvanometer, since the torque (and hence deflection) produced for a given current is proportional to the number of turns.
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.