ElectroMagnetic InductionHard
Question
An electric moter runs on a D.C., sources of emf. E and internal resistance ′r′. Then the power out put of source is maximum when the armature current (Suppose resistance of armature is zero)
Options
A.
B.
C.∞
D.0
More ElectroMagnetic Induction Questions
Inductance of a solenoid is 3H and it consist of 500 turns. If number of turn make twice, then the value of self inducta...A conducting rod PQ of length 5 m oriented as shown in figure is moving with velocity (2m /s) î without any rotatio...The battery shown in the figure is ideal. The values are e = 10 V, R = 5Ω, L = 2H . Initially the current in the in...In series LR circuit XL = 3R and R is resistance. Now a capacitor with XC = R is added in series. Ratio of new to old po...Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon -...