Electrical Circuits

111. In an RL series circuit,

1. Current lags voltage by less than 90°
2. Current lags voltage by 180°
3. Current lags voltage by 90°
4. Current leads voltage by 90°

View answer

112. In calculating maximum instantaneous power voltage or current is used.

1. Peak
2. Average
3. Rms
4. Instantaneous

View answer

113. In dividing or multiplying phasor quantities, __________ form is used.

1. Polar
2. Rectangular
3. Trigonometric
4. Exponential

View answer

114. In liquids and gases, ionization current results from a flow of

1. Positive or negative ions
2. Free electrons
3. Ions that are lighter in weight than electrons
4. Protons

View answer

115. In Norton's theorem, the short circuit current is obtained by

1. Opening the load terminals
2. Shorting the load terminals
3. Opening the voltage source
4. Shorting the voltage source

View answer

116. In the 5-band method of capacitor color coding, the first band indicates

1. Temperature coefficient
2. Tolerance
3. 1^st digit
4. Capacitance value

View answer

117. Inductive reactance applies only to sine waves because it

1. Increases with lower frequencies
2. Increases with lower inductance
3. Depends on the factor 2 1t
4. Decreases with higher frequencies

View answer

118. It is impossible to change the voltage across a capacitor instantly, as this would produce current.

1. Infinite
2. Zero
3. Low
4. High

View answer

119. Kirchhoff's laws (KCL and KVL) are applicable to

1. DC circuits
2. AC circuits
3. DC as well as AC circuits
4. Passive networks alone

View answer

120. Leakage resistance in a capacitor results into

1. Internal heating
2. Internal bleeding
3. Shorter useful life
4. Short-circuiting

View answer