A. increases with decrease of inductance and increase of resistance

B. increases with decrease of inductance and decrease of resistance

D. increases with the increase of inductance and the increase of resistance

A. average voltage

B. peak voltage

C. none of the above

A. capacitance is less and frequency of supply is more

B. capacitance is more and frequency of supply is less

C. capacitance is more and frequency of supply is more

A. to reduce voltage regulation of the line

B. to maximise the utilization of the capacities of generators, lines and transformers

D. to reduce line losses

A. 20 Hz

B. 40 Hz

D. 30 Hz

B. unsymmetrical part of the wave form

C. the quarter cycle

D. the half cycle

B. applied voltage increases but current decreases

C. both applied voltage and current increase

D. both applied voltage and current decrease

A. inductance only

B. none of the above

C. capacitance only

B. increases with the decrease of inductance and decrease of resistance

C. increases with decrease of inductance and increase of resistance

D. increases with the increase of inductance and the increase of resistance

B. transformers

C. current transformers

D. auto transformers

A. increasing core length

C. decreasing the number of turns

D. decreasing the diameter of the former

A. low efficiency

B. maximum load current

D. unity power factor

B. C only

C. L only

D. R only

E. R,LorC

A. increase heat radiation

B. make assembly cheap and easier

C. reduce circuit permeability

A. becomes zero with the increase in supply frequency

C. decreases with the increase in supply frequency

D. is unaffected by the supply frequency

A. RC2

B. R/C

C. R2C

B. lags

C. none of the above

D. remains in phase with

A. impedance is maximum

C. voltage across C is minimum

D. current is minimum

A. increase in temperature

B. skin effect

C. capacitive effect between adjacent coil turns

A. be four times as high

C. be reduced by half

D. be reduced to one fourth

A. 111 V

B. 141.4 V

D. 100 V

A. 84.84 sin 25 t

B. 60 sin 25 t

C. 30 sin 50 t

B. an instrument used for measuring phases of an unbalanced 3-phase load

C. a line representing the magnitude and direction of an alternating quantity

D. a coloured tag or band for distinction between different phases of a 3-phase supply

A. the current flowing in the inductor

C. the big size of the inductor

D. the reactance of the inductor

A. 60 sin 50 t

B. 60 sin 25 t

D. 42.42 sin 314 t

A. can act as energy storage devices

B. oppose sudden changes in voltage

D. connecting them in parallel increases the total value

B. The equivalent resistance is greater than any one of the resistors

C. The voltage across element is in proportion to its resistance value

D. The current through each element is same

A. high voltage across the load

B. low voltage across the load

C. minimun voltage across the load

B. create more electrical noise

C. consume more power

D. are likely to melt under excessive eddy current heat

A. a purely capacitive circuits ability to resist the flow of current

B. the extent of neutralisation of reactive power in a circuit

D. reactive power in a circuit

B. the speed with which the alternator runs

C. the number of electrons passing through a point in one second

D. the number of cycles generated in one minute

A. leading

B. zero

D. lagging

A. Vc and VR

C. none of the above

D. VL and VR

A. Sine wave

B. Square wave

C. Triangular wave

A. none of above is zero

C. apparent power is zero

D. reactive power is zero

B. 25% of maximum value

C. 90% of the maximum value

D. 50% of maximum value

A. depends upon the magnitude of L

B. depends upon the magnitude of R, Land C

C. depends upon the magnitude of C

A. increases with the decrease of capacitance and decrease of resistance

B. increases with the increase of capacitance and decrease of resistance

D. increases with the decrease of capacitance and increase of resistance

A. Resistance

B. Inductance

C. Conductance

B. be reduced to one fourth

C. be four times at high

D. be doubled

B. exchange of power takes place between capacitor and supply line

C. exchange of power takes place between inductor and supply line

D. power is consumed in resistance and is equal to I R

E. exchange of power does not take place between resistance and the supply line

B. resistance

C. capacitive reactance

D. inductive reactance

A. low

B. high

D. very low

A. have current in each section equal to the line current

C. have a high voltage developed across each inductive and capacitive section

D. act like a resistor of low value

A. very low

B. medium

D. low

B. A coil with large resistance

C. A coil with low resistance

D. A coil with low distributed capacitance

A. 12 kW

B. 22 kW

C. 64 kW

B. ratio of W and VA

C. ratio of kW and kVA

D. ratio of J and Z

A. demand

C. load

D. form

A. 8 kVAR

C. 4 kVAR

D. 16 kVAR