Test: Series-Parallel Interconnection of Two Port Network
15 Questions MCQ Test Network Theory (Electric Circuits) | Test: Series-Parallel Interconnection of Two Port Network
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For the circuit given below, the value of z21 parameter is ____________
Consider a cube having resistance R on each of its sides. For this non-planar graph, the number of independent loop equations are _______________
We know that the number of equations is given by,
L = B – N + 1
Where, B = Number of Branches, N = Number of Nodes
Here, B = 12 and N = 8.
So, L = 12 – 8 + 1 = 5.
Consider a series RL circuit in which current 12 A is flowing through R and current 16 A is flowing through L. The current supplied by the sinusoidal current source I is ____________
Current I (t) is given by,
Two coils X and Y have self-inductances of 5 mH and 10 mH and mutual inductance of 3 mH. If the current in coils X change at a steady rate of 100 A/s, the emf induced in coil Y is ____________
The emf is given by,
Hence, the emf induced in coil Y is given by 0.3 V.
The Thevenin’s equivalent of a network is a 10 V source in series with 2 Ω resistances. If a 3 Ω resistance is connected across the Thevenin’s equivalent is _____________
The Thevenin equivalent voltage is given by,
And the Thevenin equivalent Resistance is given by,
A parallel RLC circuit with R1 = 20, L1 = 1/100 and C1 = 1/200 is scaled giving R2 = 104, L2 = 10-4 and C2, the value of C2 is ___________
Consider an RL series circuit having resistance R = 3 Ω, inductance L = 3 H and is excited by 6V. The current after a long time after closing of switch is ____________
At t = ∞ the circuit has effectively two 6Ω resistances in parallel
Given voltage = 6 V
So, current = 2 A.
For the circuit given below, the value of z11 parameter is ____________
∴ [z] = [1.775 + j4.26; -1.775 – j4.26; -1.775 – j4.26; 1.775 – j5.739] Ω.
Given two voltages, 50 ∠0 V and 75 ∠- 60° V. The sum of these voltages is ___________
The voltages can be written in the form,
50 + j 0.75∠-60°
= 37.5 – j 64.95
So, sum = (50 + 37.5) – j 64.95
= 87.5 – j 64.95 = 109∠-36.6°.
Consider a circuit having resistances 16 Ω and 30 Ωis excited by a voltage V. A variable resistance R is connected across the 16 Ω resistance. The power dissipated in 30 Ω resistance will be maximum when value of R is __________
We know that,
When R = 0, circuit current = V/30A
And Power dissipated = V2/30 Watts.
This is the maximum possible value which occurs for R = 0 Ω.
A 50 Hz current has an amplitude of 25 A. The rate of change of current at t = 0.005 after i = 0 and is increasing is ____________
The current i (t) is given by,
i = 25 sin 314.16 t and di/dt = 250 X 314.16 cosωt
Now, at t = 0.005, I = 25 X 314.16 cos (314.16 X 0.005)
= 0.
A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?
We know that, MMF for air
Where B is the magnetic field intensity.
Barletts Bisection Theorem is applicable to ___________
A symmetrical network can be split into two halves. So the z parameters of the network are symmetrical as well as reciprocal of each other. Hence Barletts Bisection Theorem is applicable to Symmetrical networks.
The energy stored in a coil is 108 J. The power dissipated instantaneously across the blades of switch after it is opened in 10 ms is ____________
Power dissipated instantaneously across the blades of the switch is given by,
Given that, Energy = 108 J and time = 10 X 10-3
If the diameter of a wire is doubled, the current carrying capacity of the wire is ___________
Since diameter is doubled, area of cross-section becomes four times. Current carrying capacity is proportional to area of cross-section.
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