Unit of electric potential

(A) Ampere 

(B) Volts 

(C) coulomb 

(D) Volt-ampere

The Product Of Apparent Power And Sine Of The Phase Angle Between Circuit Voltage And Current is 

(A) True Power 

(B) Reactive Power 

(C) Voltamperes 

(D) Instantaneous Power

The number of poles in a 3-phase induction motor is determined by 

(A) supply frequency 

(B) Motor speed 

(C) Both (A) & (B) 

(D) Supply voltagea

The Product Of Apparent Power And Cosine Of The Phase Angle Between Circuit Voltage And Current is 

(A) True Power 

(B) Reactive Power 

(C) Voltamperes 

(D) Instantaneous Power

How many cycles does a sine wave go through in 10s when its frequency is 60HZ

(A)10 cycles 

(B) 60 cycles 

(C) 600 cycles 

(D) 6 cycles 

If E₁ = Asinωt and E₂ = Asin(ωt – θ), then 

(A) E₁& E₂ are in phase 

(B) E₂ lags E₁ by θ 

(C) E₁ lags E₂ by θ 

(D) E₂ lags E₁ by 90°

In An A.C. Circuit Power is Dissipated In 

(A) Resistance Only 

(B) Inductance Only 

(C) Capacitance Only 

(D) None Of The Above

 A transformer has 

(A) primary and secondary windings, both of which are considered outputs 

(B) primary and secondary windings, both of which are considered inputs 

(C) a primary winding used as an output and a secondary winding used as an input 

(D) a primary winding used as an input and a secondary winding used as an output

The Apparent Power Drawn By An A.C. Circuit is 10 Kva And Active Power is 8 Kw. The Reactive Power In The Circuit is 

(A) 4 Kvar 

(B) 6 Kvar 

(C) 8 Kvar 

(D) 16 Kvar

Power Factor Of An Electrical Circuit is Equal To 

(A) R/Z

(B) Cosine Of Phase Angle Difference Betweencurrent And Voltage 

(C) Kw/Kva

(D) Ratio Of Useful Current To Total Currrent iw/I 

(E) All Above