ECE :: Exam Questions Paper
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In a network with twelve circuit elements and five nodes, what is the minimum number of mesh equations?
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Consider the following:
- Coupling capacitor
- Emitter by-pass capacitor
- Emitter to base diffusion capacitance of the BJT
- Stray capacitance of the circuit.
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Assertion (A): A z-directed rectangular waveguide with cross-sectional dimensions 3 cm x 1 cm will support propagation at 4 GHz.
Reason (R):
where λ is the wavelength. -
Consider differential equation
with the initial condition y(0) = 0. Using Euler's first order method with a step size of 0.1, the value of y(0.3) is -
Consider the following statements:
- Taking 2's complement is equivalent to sign change.
- In the 2's complement representation the most significant bit (MSB) is zero for a positive number.
- In a 4 bit binary representation of a binary number A, A + 1's complement of A = 24.
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Consider the following statements:
- Strictly speaking C supports 1-dimensional arrays only.
- An array element may be an array by itself.
- Array elements need not occupy contiguous memory locations.
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Consider the following circuit using an ideal OP-AMP. The I-V characteristics of the diode is described by the relation
where VT = 25mV, I0 = 1mA and V is the voltage across the diode (taken as positive for forward bias). For an input voltage V1 = - 1 V, the output voltage V0 is 
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Which of the following statements is true regarding the fundamental mode of the metallic waveguides shown?
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Assertion (A): A rectifier with inductor filter is more efficient for high load current.
Reason (R): In rectifier with inductor filter we can use a larger choke to reduce ripple, larger choke will have higher dc resistance which will result in lower dc output voltage for higher load current.
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