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| Basic Electrical |
1. Assertion (A): It is necessary that the tuning coil should be of high resistance and low inductance.
Reason (R): High value of Q-factor means not only higher magnification but also a higher selectivity of the tuning coil.
a. A is true, but R is false
b. A is false, but R is true
c. Both A and R are true, but R is not the correct explanation of A
d. Both A and R are true, and R is the correct explanation of A
2. Voltage transfer function of a simple RC differentiator has______.
a. A zero at infinite and a finite pole
b. A zero at origin and a finite pole
c. A finite zero and a pole at the origin
d. A finite zero and a pole at infinity
3. Assertion (A): Simple resistors, inductors and capacitors are linear elements.
Reason (R): The resistances, inductances and capacitances do not change with a change in applied voltage or the circuit current.
a. A is true, but R is false
b. A is false, but R is true
c. Both A and R are true, but R is not the correct explanation of A
d. Both A and R are true, and R is the correct explanation of A
4. A network function can be completely specified by:_____.
a. Real part of poles
b. Real parts of zeros
c. Poles and zeros
d. Poles, zeros and scalar factor
5. Which of the following property does not relates to LC impedance or admittance functions ?
a. The highest and lowest powers of numerator or denominator polynomials differ by unity
b. Poles and Zeros lie on negative real axis, and they alternate
c. This is the ratio of even to odd or odd to even polynomial
d. There must be either a pole or zero at infinity or origin
6. If the impulse response is realisable by delaying it appropriately and is bounded for bounded excitation, then the system is said to be______.
a. Non-causal and unstable
b. Causal and stable
c. Non-causal but stable
d. Causal but unstable
7. A network-A has zeros only in the left-half of the s-plane while the network-B has zeros only in the right-half of the s-plane. The network-A and Network-B will respectively called______.
a. A minimum phase function and a non-minimum phase function
b. An all pass function ans non-minimum phase function
c. A non-minimum phase function and an unstable function
d. A stable function and an unstable function
8. An LC-admittance or impedance function______.
a. has all zeros on the negative real axis of the s-plane
b. has simple poles and zeros in the left half of the s-plane
c. is an odd rational function
d. has no pole or zero at the origin or infinity
9. A stable system must have______.
a. negative real parts for all zeros and pole
b. positive real part for any pole or zero
c. At least one pole or zero lying in the right-half s-plane
d. zero or negative real part for poles and zeros
10. A Hurwitz polynomial has_____.
a. poles anywhere in s-plane
b. zero anywhere in s-plane
c. only poles in the left half of s-plane
d. only zeros in the left half of s-plane
11. Cauer and Foster forms of realization are used for_____.
a. Transfer impedance functions
b. Driving point impedance functions
c. Transfer reactance functions
d. Driving point reactance functions
12. In the incidence matrix of a graph_____.
a. The determinant value is zero provided the loop is a closed one
b. Algebraic sum of the coulmn entries is zero
c. Both (a) and (b)
c. None of the above
13. Two graphs are said to be isomorphic graph if their incidence matrices_____.
a. Are transpose of each other
b. have a determinant value of unity
c. Are identical
d. have a determinant value of zero
14. The dual of series RL circuit is______.
a. Series RC circuit
b. Parallel RC circuit
c. Series RC circuit
d. Parallel RL circuit
15. Three-phase power can be measured by two-wattmeter method in case of_____.
a. Balanced load only
b. Balanced load and balanced source only
c. Unbalanced load and unbalanced source only
d. Both (b) and (c)
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