why does there is still a non-vanishing potential difference across its terminals when the motor is in used and current is running through it eventhough the rotor of a simple DC motor has negligible resistance? a. The potential difference develops across the terminal and induced emf develops due to a changing magnetic flux across the rotor as it rotates in a magnetic field. (Faraday's Law) b. Negative charges cannot move, the positive charges can, causing a potential difference due to their net separation. c. Different sides of the rotor move at different velocities. Different KE which in need for energy input d. As it rotates, resistance develops due to the brush system reversing the current direction in the rotor which leads potential difference (V=IR) e.The potential difference across the terminals of a motor is simply the applied voltage from a suitable source, presumably with non-zero value.
why does there is still a non-vanishing potential difference across its terminals when
the motor is in used and current is running through it eventhough the rotor of a simple DC motor has negligible resistance?
a. The potential difference develops across the terminal and induced emf develops due to a changing magnetic flux across the rotor as it rotates in a magnetic field. (Faraday's Law)
b. Negative charges cannot move, the positive charges can, causing a potential difference due to their net separation.
c. Different sides of the rotor move at different velocities. Different KE which in need for energy input
d. As it rotates, resistance develops due to the brush system reversing the current direction in the rotor which leads potential difference (V=IR)
e.The potential difference across the terminals of a motor is simply the applied voltage from a suitable source, presumably with non-zero value.
Step by step
Solved in 2 steps
