Electrical Circuits Mid - I, September - 2011

1.Identify the passive element among the following
  • Voltage source
  • current source
  • inductor
  • transistor
Answer: D
2.How much energy is stored by a 0.05μF capacitor with a voltage of 1000V?
  • 0.025J
  • 0.05J
  • 5J
  • 100J
Answer: A
3.Mesh Analysis is based on ………
  • KCL
  • KVL
  • Both
  • None
Answer: B
4.The nodal method of circuit analysis is based on ………….
  • KVL + ohms law
  • KCL + ohms law
  • KVL + KCL
  • KVL + ohms law +KCL
Answer: B
5.The form factor of DC voltage is……………...
  • Zero
  • Infinity
  • unity
  • 0
Answer: C
6.In a pure capacitor, the voltage ………………
  • Is in phase with current
  • Is out of phase with current
  • lags behind current by 90 deg
  • leads behind current by 90 deg
Answer: C
7.A power factor of zero indicates …………..
  • purely resistive element
  • purely reactive element
  • combination of both A & B
  • none
Answer: A
8.What is the phase angle of a series RLC circuit at Resonance?
  • Infinity
  • Zero
  • 45 deg
  • 90 deg
Answer: B
9.What is the total reactance of a series RLC circuit at Resonance? …..
  • Zero
  • equal to XL
  • equal to Xc
  • equal to R
Answer: A
10.The number of independent loops for a network with ‘n’ nodes and ‘b’ branches is …..
  • n-1
  • b-n
  • b-n+1
  • independent of number of nodes
Answer: C
11.In series circuit, …………………….. acts as a reference
Answer: CURRENT
12.In parallel circuit, ……………………. acts as a reference
Answer: VOLTAGE
13.The property of opposing the flow of electrons is called as ……………..
Answer: RESISTANCE
14.Inductor acts as a …………………… to DC
Answer: SHORT CIRCUIT
15.Ideal sources is nothing but sources ……………… losses
Answer: WITH OUT LOSSES
16.Ratio of RMS value to the Average value is called as ………………
Answer: FORM FACTOR
17.Phasor diagram is used to represent the relation between two (or) more Sine waves of same __________
Answer: FREQUENCY
18.Unit of susceptance is …… ……………….
Answer: SIEMENS
19.The magnitude & phase of current vector is depend on the values of……………………
Answer: R,L,C,F
20.If the Band width is low the selectivity will be ……………………….
Answer: HIGH