Q. An opamp that is powered from a ± 5V supply is used to build a non-inverting amplifier having a gain of 15. The slew rate of the opamp is 0.5*106 V/s. For a sinusoidal input with amplitude of 0.3 V, the maximum frequency (in kHz) up to which it can be operated without any distortion is (up to ...
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Q. Unit step response of a linear time invariant (LTI) system is given by 𝑦(𝑡) = (1 − 𝑒−2𝑡)𝑢(𝑡). Assuming zero initial condition, the transfer function of the system is Ans: Option D
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Q. The Fourier transform of a signal 𝑥(𝑡), denoted by 𝑋(𝑗w), is shown in the figure. Let 𝑦(𝑡) = 𝑥(𝑡) + 𝑒𝑗𝑡𝑥(𝑡). The value of Fourier transform of 𝑦(𝑡) evaluated at the angular frequency w= 0.5 rad/s is (A) 0.5 (B) 1 (C) ...
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Q. In the given circuit, the mesh currents I1, I2 and I3 are (A) I1 = 1 A, I2 = 2 A and I3 = 3 A (B) I1 = 2 A, I2 = 3 A and I3 = 4 A (C) I1 = 3 A, I2 = 4 A and I3 = 5 ...
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Q. In the figure, an RLC load is supplied by a 230 V, 50 Hz single phase source. The magnitude of the reactive power (in VAr) supplied by the source is Ans: 66-68
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Q. In the given circuit, superposition is applied. When V2 is set to 0 V, the current I2 is -6 A. When V1 is set to 0 V, the current I1 is +6 A. Current I3 (in A) when both sources are applied will be (up to two decimal places) . Ans: 0.95-1.05
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Q. In the given circuit, superposition is applied. When V2 is set to 0 V, the current I2 is -6 A. When V1 is set to 0 V, the current I1 is +6 A. Current I3 (in A) when both sources are applied will be (up to two decimal places) Ans: 0.95-1.05
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Q. Two bags 𝐴 and 𝐵 have equal number of balls. Bag 𝐴 has 20% red balls and 80% green balls. Bag 𝐵 has 30% red balls, 60% green balls and 10% yellow balls. Contents of Bags 𝐴 and 𝐵 are mixed thoroughly and a ball is randomly picked from the mixture. What is the chance that the ball picked is red? ...
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Q. An optical pulse containing 6 × 106 photons is incident on a photodiode and 4.5 × 106 electron-hole pairs are created. The maximum possible quantum efficiency (in %) of the photodiode is Ans: 75 Sol: Number of incident photons ′N′=6×106 Number of electron-hole pairs generated ...
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Q. An amplitude modulated signal is shown in the figure. The modulation index is (up to one decimal place) . Ans: 0.3
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