The torque produced by a DC motor armature...

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Question 1 of 205eccefa3bacbc34ba4d48064

The torque produced by a DC motor armature is the multiplication product of two factors, one being the density of the magnetic flux which is dependent upon the field current. What is the other multiplication factor?

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🔍 Key Concepts

• Relationship between torque in a DC motor and electrical/ magnetic quantities • How armature current interacts with magnetic flux to produce force on conductors • Basic proportionality: torque ∝ flux × armature current in a DC motor

💭 Think About

• In a DC motor, which quantity actually flows through the armature conductors and directly produces a force in the magnetic field? • Which of the options would change immediately if you increased the mechanical load on the motor shaft, assuming the supply voltage stays constant? • Among the choices, which one appears in the standard DC motor torque equation alongside magnetic flux?

✅ Before You Answer

• Recall that torque in a DC motor is proportional to flux per pole (ϕ) times another quantity related to the armature. • Check which option represents a flow (rate) rather than a property or drop. • Verify which factor is typically controlled or observed when adjusting load and torque in DC motor operation.

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