A.C. Fundamentals, Circuits and Circuit Theory

A. a line which represents the magnitude and phase of an alternating quantity
B. a line representing the magnitude and direction of an alternating quantity
C. a coloured tag or band for distinction between different phases of a 3-phase supply
D. an instrument used for measuring phases of an unbalanced 3-phase load

A. reactive power in a circuit
B. the extent of neutralisation of reactive power in a circuit
C. a purely capacitive circuit’s ability to pass current
D. a purely capacitive circuit’s ability to resist the flow of current

A. 0°
B. 45°
C. 90°
D. 180°

A. lags
B. leads
C. remains in phase with
D. none of the above

A. The current through each element is same
B. The voltage across element is in proportion to it’s resistance value
C. The equivalent resistance is greater than any one of the resistors
D. The current through any one element is less than the source current

A. between 0° and 90°
B. between 90° and 180°
C. between 180° and 270°
D. no where

A. resistance only
B. inductance only
C. capacitance only
D. none of the above

A. very low
B. low
C. medium
D. high

A. electronic equipment
B. transformers
C. current transformers
D. auto transformers

A. low
B. very low
C. high
D. very high