safe guard it against creep
brake the instrument
bring energy meter to stand still
maintain steady speed and equal to driving torque
Answer is Wrong!
Answer is Right!
The correct answer is: B. brake the instrument.
Braking torque is produced in an energy meter to stop the meter from spinning too fast. This is necessary to prevent the meter from overheating and damaging itself. The braking torque is usually produced by a small electromagnet that is activated when the meter reaches a certain speed.
The other options are incorrect because:
- Option A is incorrect because the braking torque is not produced to safeguard the meter against creep. Creep is a slow, gradual movement of the meter that can occur over time. The braking torque is not designed to prevent this.
- Option C is incorrect because the braking torque is not produced to bring the energy meter to a stand still. The braking torque is designed to slow the meter down, but it will not stop the meter completely.
- Option D is incorrect because the braking torque is not produced to maintain a steady speed. The braking torque is designed to slow the meter down, but it will not maintain a steady speed.