The torque required
The speed of the motor
motor is directly proportional to A. The torque required B. The speed of the motor C. The voltage across the terminals
None of the above
Answer is Wrong!
Answer is Right!
The correct answer is: C. The voltage across the terminals.
The current drawn by the armature of a DC motor is directly proportional to the voltage across the terminals. This is because the voltage across the terminals is what drives the current through the armature. The higher the voltage, the more current will flow through the armature.
The torque required and the speed of the motor are not directly proportional to the current drawn by the armature. The torque required is determined by the load on the motor. The faster the motor runs, the less torque is required.
Here is a more detailed explanation of each option:
- A. The torque required. The torque required is not directly proportional to the current drawn by the armature. The torque required is determined by the load on the motor. The faster the motor runs, the less torque is required.
- B. The speed of the motor. The speed of the motor is not directly proportional to the current drawn by the armature. The speed of the motor is determined by the voltage across the terminals and the resistance of the armature.
- C. The voltage across the terminals. The voltage across the terminals is directly proportional to the current drawn by the armature. This is because the voltage across the terminals is what drives the current through the armature. The higher the voltage, the more current will flow through the armature.
- D. None of the above. None of the options are directly proportional to the current drawn by the armature.