Electrical Circuits Mid - I, September - 2014

1.Ideal Voltage source should have
  • Zero Internal resistance
  • Infinite internal resistance
  • Large value of emf
  • Low value of current
Answer: A
2.Kirchhoff’s laws are valid for
  • Linear circuits only
  • Passive time invariant circuits
  • Non- Linear circuits only
  • Both Linear circuitsand Non- Linear circuits
Answer: A
3.The energy Capacity of a storage battery is rated in
  • KWh
  • KW
  • Ampere hours
  • Joules
Answer: C
4.Mesh analysis is based on
  • Kirchhoff’s Current Law
  • Kirchhoff’s Voltage Law
  • Both
  • None
Answer: B
5.An ideal Voltage Source will charge an ideal capacitor
  • In infinite time
  • Exponentially
  • Instantaneously
  • None of the above
Answer: C
6.A Circuit of lagging power factor behaves as
  • An inductive circuit
  • A capacitive circuit
  • R-L Circuit
  • R-C Circuit
Answer: A
7.The Phasor combination of resistive power and Reactive Power is called
  • True Power
  • Apparent Power
  • Reactive Power
  • Average Power
Answer: B
8.What is the total reactance of a series R-L-C Circuit at resonance.
  • Equal to XL
  • Equal to XC
  • Equal to R
  • Zero
Answer: D
9.The Form Factor of DC Voltage is
  • Zero
  • Infinite
  • Unity
  • 0.5
Answer: C
10.Super Position Theorem is Valid For
  • Linear circuits
  • nonlinear circuits
  • both linear andnonlinear circuits
  • None
Answer: A
11.Ohm’s Law is Defined as __________________
Answer: R = V/I = Constant
12.Form factor is Defined as______________________
Answer: Form Factor = r.m.s value/average value
13.In a pure capacitor the current leads voltage by____________________
Answer: 90
14.Power factor is expressed in terms of P, V, I as ____________
Answer:
15.Reonant frequency of R-L-C series circuit is given by ______
Answer: Resonant frequency = fr = 
16.Give example for active elements
Answer: Voltage source, Current source
17.Energy stored in a capacitor is given as
Answer: E = 1/2 CV2
18.Form factor of a sine-wave is given by _______
Answer: Form factor = 1.11
19.The relation between voltage and current in an inductor is__________________
Answer:
20.The basis for nodal analysis is____________________
Answer: KCL