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                                                 PEE

                                                     FIRST MID JNTUH ONLINE BITS  

              

                                                     UNIT-1(TRANSIENT ANALYSYS)    

                     

1.  A capacitor does not allow sudden changes in [   b ]

     (a)currents (b)voltages (c)both a and b (d)power

2.  The time constant of a series RC circuit is [ C]

  (a)1/RC (b)R/C (c)RC (d)C/R

3.  The transient response occurs [  D ]

(a)only in R circuits (b) only in L circuits (c) only in C circuits (d)both b and c

4. The time constant of a series RL circuit is

 L/R

5. When a series RL circuit is connected to a voltage v at t=0, the current passing through the L at t=0+is    zero

6. Transient behavior occurs in any circuit when [D   ]

(a)there are sudden changes of applied voltage (b)the voltage source is shorted

(c)the circuit is connected or disconnected from the supply (d)all of the above happen

7.  The parameter that cannot change instantaneously in a capacitor is [  D]

(a)current (b)power (c)energy (d)voltage

8.  When a series RL circuit is connected to a voltage V at t=0,the current passing through the inductor L at t=0⁺ is [  A]

(a)V/R (b)infinite (c)zero (d)V/L

9. The time constant of a series RL circuit is   L/R

10. The Laplace transform of a unit step function is  1/s

11. Laplace transform analysis gives   time domain,__and ______ frequency domain _____responses

12.  A ramp voltage ,v(t)=100 volts,is applied to an RC series circuit with R=5kΩ and C=4 uF. The maximum output voltage across capacitor is [B ]

(a)0.2 volts (b)2.0 volts (c)10.0 volts (d)50.0 volts

13.  The final value theorem is used to find the [A ]

(a) steady state value of system output (b) initial value of the system output

(c) transient behavior of the system output (d) none of these

                        UNIT-2(TWO PORT NETWORKS)

1.  A two port network is simply a network inside a black box, and the network has only [B]

(a)two terminals (b)two pairs of accessible terminals (c)two pairs of ports (d)all above

2.  Which parameters are widely used in transmission line theory [C ]

(a)Z parameters (b)Y parameters (c)ABCD parameters (d)h parameters

3. The h parameters h11 and h12 are obtained by shorting   OUTPUT terminals.

4. The number of possible combinations generated by four variables taken two at a time in a two port network is   6

6.  For a two port network to be reciprocal [  c ]

(a)Z₁₁=Z₂₂ (b)y₂₁=y₂₂ (c)h₂₁= -h₁₂ (d)AD-BC=0

7.  If Z₁₁=2Ω; Z₁₂=1Ω; Z₂₁=1Ω and Z₂₂=3Ω, what is the determinant of admittance matrix? 1

7.  The ABCD parameters of a passive two port network are related as AD-BC=1

8. For a two port bilateral network, the three transmission parameters are given by A=6/5 ;B=17/5

and C=1/5, what is the value of D? 7/5

9. In case of a symmetrical two-port network the relationship of Y-parameters is Y11=Y22

                                           UNIT-3(FILTERS)

1.  A low pass filter is one which    [  C   ]

(a)passes all low frequency (b)attenuates all high frequencies

(c)passes all frequencies upto cutoff frequency and attenuates all other frequencies (d)both a and b

2.  The condition for a network with Z₁ series impedance and Z₂shunt impedance to have a pass band is      [    B  ]

(a)0<Z1/4Z2<1 (b) -1<Z1/4Z2<0 (c)Z1-Z2 = 0 (d) both a and c

3.  For a prototype high pass filter, the series element is [   C]

(a)resistive (b)inductive (c)capacitive (d)both R and L

4.  In the m-derived high pass filters the resonant frequency is to be [B ]

(a)above the cutoff (b)below the cutoff (c)both a and b (d)none

5. An ideal filter should have zero attenuation in   pass band

6. In the m-derived high pass filters the resonant frequency is to be below the   cut off frequency

7. In the m-derived low pass filters the resonant frequency is to be above the   cut off frequency

8.  The value of m in m-derived filter is [C ]

(a)less than zero (b)more than one (c)between zero & one (d)one

9.  An ideal filter should have [A ]

(a) zero attenuation in the pass band (b) infinite attenuation in the pass band

(c) zero attenuation in the attenuation band (d) none of these

10. The characteristic impedance (Z_0T) of a T-section filter having total series and shunt impedances as Z₁ and Z₂ respectively is given by

                     UNIT-4(SYMMETRICAL ATTENUATORS)

1. For an H-type attenuator matched to a transmission line of 600ohms impedance each of the series resistance is 2400ohms. The value of the shunt resistance will be ________ ohms [B ]

(a)95 (b)135 (c)216 (d)840

2.  The real part of propagation constant of a symmetrical network are [ A]

(a) Attenuation constant (b) Phase constant (c) Transfer constant (d) Image constant

3. The units of attenuation are nepers or dBs