STUPIDSID
1
Find the equivalent resistance of the circuit shown in Fig
2 M
2
Define RMS voltage.
2 M
3
What is reciprocity theorem?
2 M
4
Why do you short circuit the voltage source and open the current source when you find Thevenin's voltage of a Network?
2 M
5
Define quality factor in the resonant circuit.
2 M
6
Determine the quality factor of a coil for the series resonant circuit consisting of R=10 ohm, L=0.1h, and C=10 microfarad.
2 M
7
Distinguish between natural and forced response.
2 M
8
What is the time constant for RL and RC circuit?
2 M
9
Write the effect of power factor in energy consumption billing
2 M
10
Distinguish between unbalanced source and unbalanced load.
2 M
11 (a) (i)
Find the current I and voltage across 30 ? of the circuit shown in Fig. 11 (a) (i).
8 M
11 (a) (ii)
Determine the current in all the resistors of the circuit shown in Fig. 11 (a) (ii).
8 M
11 (b) (i)
Determine the current through each resistor in the circuit shown in Fig. 11(b) (i)
6 M
11 (b) (ii)
When a dc voltage is applied to a capacitor, voltage across its terminals is found to build up in accordance with vc=50 (1-e-100t). After 0.01 S the current flow is equal to 2 mA.
(1) Find the value of capacitance in farad.
(2) How much energy stored in the electric field?
(1) Find the value of capacitance in farad.
(2) How much energy stored in the electric field?
10 M
12 (a) (i)
Determine the current in the 5? resistor in the network shown in Fig. 12 (a) (i).
8 M
12 (a) (ii)
Find out the current in each branch of the circuit shown in Fig.12 (a) (ii)
8 M
12 (b) (i)
Determine current in each mesh of the circuit shown in Fig 12 (b) (i)
8 M
12 (b) (ii)
Determine the voltage at each node of the of the circuit shown in Fig. 12 (b) (ii)
8 M
13 (a)
For the circuit shown in Fig 13(a), determine the impedance at resonant frequency, 10 Hz above resonant frequency, and 10Hz below resonant frequency.
16 M
13 (b)
Explain that how to derive Q factor of parallel resonance.
16 M
14 (a)
A series RL circuit with R=30? and L=15H has a constant voltage V=60 v applied at t=0 as shown in Fig. 14(a). Determine the current i, the voltage across resistor and the voltage across the inductor.
16 M
14 (b)
The circuit shown in Fig. 14 (b) consists of resistance, inductance and capacitance in series with 100V DC when the switch is closed at t=0. Find the current transient.
16 M
15 (a) (i)
A symmetrical three-phase; three wire 440V supply to a star connected load. The impedance in each branch are ZR =2+j?, ZY=1-j2? and ZB=3+j4?. Find its equivalent delta connected load.
8 M
15 (a) (ii)
A three phase, balanced delta-connected load 4+j? is connected across a 400V, 3? balanced supply. Determine the phase currents and line currents. (Phase sequence is RYB).
8 M
15 (b) (i)
A symmetrical three-phase, three 400V, supply to a star connected load. The impedance in each branch are ZRY=10?30? ?, ZYB=10?45? ? and ZBR=2.5?60? ?. Find its equivalent star-connected load.
8 M
15 (b) (ii)
A balanced star connected load having an impedance 15+j20? per phase is connected to 3?, 440V, 50Hz. Find the line current and power absorbed by the load.
8 M
More question papers from Circuit Theory