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| Basic Electrical |
1. For the parallel RLC circuit to be underdamped_____.
a. `R < 2\sqrt{\frac{L}{C}}`
b. `R>2\sqrt{\frac{L}{C}}`
c. `R>\frac{1}{2}\sqrt{\frac{L}{C}}`
d. `R<\frac{1}{2}\sqrt{\frac{L}{C}}`
2. Pole of a network is frequency at which______.
a. Network frequency becomes unity
b. Network frequency becomes infiniteₐᵥ
c. Network frequency becomes zero
d. None of the above
3. A parallel RLC circuit is said to be underdamped_____.
a. `R < 2\sqrt{\frac{L}{C}}`
b. `R>2\sqrt{\frac{L}{C}}`
c. `R>\frac{1}{2}\sqrt{\frac{L}{C}}`
d. `R<\frac{1}{2}\sqrt{\frac{L}{C}}`
4. In a purely resistive circuit, the average power Pₐᵥ is ______ the peak power Pₘₐₓ.
a. Equal to
b. one-fourth of
c. Non-half of
d. Double
5. For an ideal transformer_______.
a. y-parameters exist, but not the z-parameters
b. z-parameters exist, but not the y-parameters
c. Neither z nor y-parameter exist
d. Both z and y-parameter exist
6. What the greatest mutual inductance that an air-core transformer can have with the self-inductances of 0.3 and 0.7 H respectively.
a. 0.458 H
b. 0.350 H
c. 0.210 H
d. 0.500 H
7. Mutual inductance between two magnetically coupled coils depends on the_____.
a. cross-sectional area of their common core
b. number of turns of the coil
c. permeability of core material
d. All of the above
8. In case all the flux in coil-1 links with coil-2, the coefficient of coupling will be______.
a. zero
b. 0.5
c. 1.0
d. 2.0
9. A 3 H inductor has 1000 turns. What should be the number of turns to increase the inductance to 5 H ?
a. 2560 turns
b. 1290 turns
c. 1625 turns
d. 2000 turns
10. In a double tuned circuit, consisting of two magnetically coupled, identical high Q tuned circuits, at the resonance frequency of either circuit, the amplitude response has_____.
a. Either a peak or dip
b. Neither a peak nor a dip
c. A peak always
d. A dip always
11. A network function contains only poles whose real-parts are zero or negative. The network is_____.
a. Always unstable
b. stable, if jω-axis poles are at most of multiplicity 2
c. stable, if jω-axis poles are simple
d. Always stable
12. The minimum amount of hardware required to make a high pass filter is_____.
a. A resistance, an inductance and an op-amp
b. A resistance and capacitance
c. a. A resistance, a capacitance and an op-amp
d. a. A resistance, an inductance and a capacitance
13. When XL is equal to XC , then_____.
a. Z = XL
b. Z = XC
c. Z = R
d. None of these
14. If the quality factor of a series resonant circuit is increased then, its selectivity will______.
a. May increase or decrease
b. Remains same
c. Increase
d. Decrease
15. The figure of merit for a capacitor in parallel with a resistance R is given by______.
a. 1/ωRC
b. ωC/R
c. ωRC
d. R/ωC
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