Electromagnetic induction Which circuit element(s) will oppose the change in circuit current? Capacitance only Inductance only Inductance and capacitance Resistance only Capacitance only Inductance only Inductance and capacitance Resistance only ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Two coils have inductances of 8 mH and 18 mH and a coefficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be 36 mH 48 mH 38 mH 30 mH 36 mH 48 mH 38 mH 30 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by Variation in voltage to the coil Variation in coil current Change of number of turns of coil The resistance of magnetic path Variation in voltage to the coil Variation in coil current Change of number of turns of coil The resistance of magnetic path ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The polarity of the induced voltage can be determined by using the left-hand generator rule. Yes No Yes No ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction The self inductances of two coils are 8 mH and 18 mH. If the coefficient of coupling is 0.5, the mutual inductance of the coils is 12 mH 6 mH 36 mH 18 mH 12 mH 6 mH 36 mH 18 mH ANSWER DOWNLOAD EXAMIANS APP
Electromagnetic induction Air-core coils are practically free from Eddy current losses None of the listed here Hysteresis losses Both Hysteresis losses & Eddy current losses Eddy current losses None of the listed here Hysteresis losses Both Hysteresis losses & Eddy current losses ANSWER DOWNLOAD EXAMIANS APP
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