Question

Which force is responsible to change current into mechanical force in motor

Answer 1

Answer:

$\huge{\blue{\mathsf{Magnetic\:force}}}$

Explanation:

Before we actually move further towards its elaboration, let's first of all understand, what the Fleming's left hand rule states.

$\large{\boxed{\pink{\mathsf{Fleming's\:left\:hand\:rule:}}}}$

Fleming's left hand rule states that, stretch thumb, index finger and middle finger in such a way that they are mutually perpendicular to each other. If your index finger shows the direction of the direction of middle finger and current flowing through the conductor, then your thumb will show the direction of force or the motion of the conductor.

According to Fleming's left hand rule, the magnetic force which is acting upon that conductor through which current is passing, a force is acted upon the conductor. Due to this force, the motor starts rotating and this force is nothing but the machanical force generated by the motor.

Thus, we may conclude that only magnetic force can generate machanical force due to change in current in a motor.

$\huge{\boxed{\underline{\underline{\purple{\mathfrak{Note:}}}}}}$

• Fleming's left hand rule is only used in motor.
• Fleming's left hand rule is only used in generators.
• Right hand thumb rule is only used in straight conductors. Wherever you come to know that the question is about any straight conductor, then don't be confused. There we are gonna to use right hand thumb rule only.
• Principle of motor that is, changing magnetic field induces current in the coil is also used in Galvanometer.