A class is planning a d.c. motor. To produce a larger turning effect, three proposals are given. 1. Increase the current in the motor coil. 2. Use a stronger magnet in the motor. 3. Add more turns to the coil. Which proposals will increase the turning effect?
- A1, 2 and 3
- B1 and 2 only
- C1 and 3 only
- D2 and 3 only