In an RC series circuit R = 100 ? and XC = 10 ?. In this circuit the current and

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Question
In an RC series circuit R = 100 ? and X_C = 10 ?. In this circuit
Options
A. the current and voltage are in phase
B. the current leads the voltage by about 6�
C. the current leads the voltage by about 84�
D. the current lags the voltage by about 6�

Correct Answer

the current leads the voltage by about 6�

Explanation

In RC circuit the current leads the voltage.

In an RC series circuit R = 100 ? and XC = 10 ?. In this circuit the current and voltage are in phas

Networks Analysis and Synthesis problems

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1. A current is flowing through a conductor with non-uniform area of cross-section. Then
Options
A. current will be different at different cross-sections.
B. current will be the same at all the cross-sections.
C. current will be different but current density will be same at all the cross-sections
D. current will be the same but current density will be different at different cross-sections.

3. The time constant of the circuit in figure shown.
Options
A. RC
B.
C.
D.

4. If the diameter of a wire is doubled, its current carrying capacity becomes
Options
A. one-fourth
B. half
C. twice
D. four times

5. Two materials having temperature coefficients of 0.004 and 0.0004 respectively are joined in series. The overall temperature coefficient is likely to be
Options
A. 0.08
B. 0.04
C. 0.001
D. 0.0001

6. In the circuit of figure, the switch is closed at t = 0. At t = 0⁺ the current through C is
Options
A. 4 A
B. 2.5 A
C. 3.1 A
D. 0

7. The current rating of a cable depends on
Options
A. length of cable
B. diameter of cable
C. both length and diameter of cable
D. none of the above

9. When a current source I is suddenly connected across a two terminal relaxed RC circuit at time t = 0, the voltage across the current source is shown in figure. The RC circuit is
Options
A. a series combination of R and C
B. a parallel combination of R and C
C. a series combination of R and parallel combination of R and C
D. a pure capacitor

10. The electrical energy required to heat a bucket of water to a certain temperature is 2 kWh. If heat losses, are 25%, the energy input is
Options
A. 2.67 kWh
B. 3 kWh
C. 2.5 kWh
D. 3.5 kWh

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