Electrical Technology Mid - I, August - 2012
1.Mesh analysis based on
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kirchhoff’s current law
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kirchhoff’s voltage law
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both
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none
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Answer: B
2.Norton’s equivalent circuit consists of
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voltage source in parallel with resistance
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voltage source in series with resistance
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current source in parallel with resistance
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current source in series with resistance
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Answer: C
3.Maximum power is transferred when load impedance is
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equal to source resistance
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equal to zero
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equal to half of the resistance
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none of the above
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Answer: A
4.In a pure resistor, the voltage and current are
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out of phase
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in phase
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90 deg out of phase
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45 deg out of phase
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Answer: B
5.In a pure capacitor the voltage
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is in phase with the current
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is out of phase with the current
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lags behind the current by 90 deg
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leads the current by 90 deg
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Answer: C
6.The current in a pure inductor
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lags behind the voltage by 90 deg
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leads the voltage by 90 deg
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is in phase with the voltage
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lags behind the voltage by 45 deg
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Answer: A
7.A series RL circuit has resistance of 33kohm ,and an inductive reactance of 50kohm.what is the impedance and phase angle
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56.58kw,59.9 deg
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59.9kw,56.58deg
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59.9ohm,56.58 deg
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5.99ohm,56.58 deg
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Answer: B
8.Which of the following theorems is applicable for both linear and non linear circuits?
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superposition
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Thevenin’s
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Norton’s
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None of the above
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Answer: D
9.The nodal analysis is primarily based on the application of
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ohm’s law
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KCL
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KVL
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both(a) and(b)
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Answer: B
10.In a certain parallel RL circuit ,R=0 ohm, XL=75 ohm. what is the admittance?
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0.024S
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75S
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50S
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1.5S
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Answer: A
11.A circuit consists of two resistors R1 and R2 in parallel. Total current passing through the circuit is It .The current passing through the R1 is----------.
Answer: It*(R2/(R1+R2)_)
12.The rate of movement of charge in a conductor is known as-----------
Answer: current
13.In the RLC series circuit band width of resonant circuit is f2-f1=----------
Answer: f2-f1=R/(2*3.14L)
14.In RLC series circuit the resonant frequency fr=-------
Answer: fr=1/(2*3.14*sqrtLC)
15.The relation between quality factor and band width is-----------
Answer: B.W=fr/Q
16.The Phase angle for RLC series circuit at resonance is------
Answer: 0
17.The relationship between the line and phase voltage of a star connected circuit is----------
Answer: VL=1.732Vph
18.In the distribution system which connection is used-----------
Answer: 3-phase 4-wire
19.The winding having larger number of turns will be having--------induced emf.
Answer: more
20.The relationship between turns ratio and currents in a transformer is------------..
Answer: N2/N1=I1/I2