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 […]
A high Q coil having distributed (self) capacitance is tested with a Q-meter Read More »
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
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
The Boolean function 𝐹( 𝑋, 𝑌) realized by the given circuit is Read More »
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
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
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
The circuit given uses ideal opamps. The current I (in mA) drawn from Read More »
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
An opamp that is powered from a ± 5V supply is used to build Read More »
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) 1.5 (D) 2.5 Ans: 1.5
The Fourier transform of a signal 𝑥(𝑡), denoted by 𝑋(𝑗w), is shown in the figure Read More »
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 A
In the given circuit, the mesh currents I1, I2 and I3 are Read More »
