Q. A high Q coil having distributed (self) capacitance is tested with a Q-meter. First resonance at w1 = 106 rad/s is obtained with a capacitance of 990 pF. The second resonance at w2 = 2 ×106 rad/s is obtained with a 240 pF capacitance. The value of the inductance (in mH) of the coil is (up to ...

Q. The voltage and current drawn by a resistive load are measured with a 300 V voltmeter of accuracy ± 1% of full scale and a 5 A ammeter of accuracy ± 0.5% of full scale. The readings obtained are 200 V and 2.5 A. The limiting error (in %) in computing the load resistance is (up to two decimal ...

Q. The Boolean function 𝐹( 𝑋, 𝑌) realized by the given circuit is (A) 𝑋̅ 𝑌 + 𝑋 𝑌̅                 (B)  ̅𝑋 𝑌̅ + 𝑋 𝑌              (C)  𝑋 + 𝑌                   (D)  𝑋̅  ∙ 𝑌̅ Ans: X̅ Y + X Y̅

Q. A 2-bit synchronous counter using two J-K flip flops is shown. The expressions for the inputs to the J-K flip flops are also shown in the figure. The output sequence of the counter starting from Q1Q2 = 00 is (A) 00 → 11 → 10 → 01 → 00 … (B) 00 → 01 → 10 → 11 → 00 … (C) 00 → 01 → 11 ...

Q. The product of sum expression of a Boolean function 𝐹(𝐴, 𝐵, 𝐶) of three variables is given by 𝐹(𝐴, 𝐵, 𝐶) = ( 𝐴 + 𝐵 + 𝐶̅ ) ∙ (𝐴 + 𝐵̅ + 𝐶̅) ∙ ( 𝐴̅ + 𝐵 + 𝐶 ) ∙ ( 𝐴̅ + 𝐵̅ + 𝐶̅ ) The canonical sum of product expression of 𝐹(𝐴, 𝐵, 𝐶) is given by (A) 𝐴̅ 𝐵̅ 𝐶 + 𝐴̅ 𝐵 𝐶 + 𝐴 𝐵̅ 𝐶̅ + 𝐴 𝐵 𝐶 (B) 𝐴̅ 𝐵̅ ...

Q. The circuit given uses ideal opamps. The current I (in mA) drawn from the source vs is (up to two decimal places) _  . Ans: 0.98 - 1

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 ...

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

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) ...

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 ...

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

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