SRM University 2007 B.Tech Electronics and Communications Engineering BANK : CIRCUIT THEORY UNIT -I - Question Paper

24) A coil of 20 ohm resistance has an inductance of 0.2 henry is connected in parallel with a condenser of 100uF capacitance. compute the frequency at which the circuit will have a non-inductive resistance. obtain also the value of this resistance.
25) A series RLC ckt. has the subsequent parameter values, R=10 ohm, L=0.01 henry, C=100uF. compute the resonant frequency, quality factor of the ckt. bandwidth, lower and upper frequency of the bandwidth.
26) Define Planar and Non-Planar networks.
27) Give the relation connecting the power factor angle with 2 watt meter readings.
28) What will be the studying of 2 watt meters used for power measurement in 3 phase ckt. of unity power factor.
29) Compare balanced and unbalanced network.
30) A balanced star connected load of (3-j4) ohm impedence is connected to 400V 3-phase supply. What is the real power consumed by the load?
31) The 2 line currents taken by an unbalanced delta connected load are Ia =10/_-120’ amp, Ib =5/_150’amp. What is the line current, Ic?
32) Write the relations ranging from phase and line qualities in a delta connected balanced load.
33) Draw the circuit for 2 watt meter method of measurement of 3 - phase power.
34) A 3 – phase balanced wye – connected load has 400V line to line voltage and 10A line current. Determine the line to neutral voltage and phase current.
35) Draw the characteristic curve of watt meter ratio and power factor in a 3 – phase balanced system.
36) A sine wave has a frequency of 50KHz. How many cycles does it complete in 20ms?
37) Compare balanced and unbalanced network.
38) A balanced star-connected load of (3-j4)? impedance is connected to 400V 3-phase supply. What is the real power consumed by the load?
39) The 2 line currents taken by an unbalanced delta connected load are:
I a = 10 ?-1200 ? A, I b = five ?1500 ? A. What is the line current Ic?
50) Draw the circuit for two-wattmeter method of measurement of 3-phase power.
51) Write the relations ranging from phase and line qualities in a delta-connected balanced load.
52) Write the expressions for the power factor in balanced three- phase circuit.
53) A 3-phase balanced wye-connected load has 400V line to line voltage and 10A line current. Determine the line to neutral voltage and phase current.
54) Draw the characteristic curve of wattmeter ratio and power factor in a 3-phase balanced system.
55) Write the expression for the total power in a 3-phase balanced circuit defining every volume.

Earning:   Approval pending.