Q. For the 3-bit binary counter shown in the figure, the output increments at every positive transition in the clock (CLK). Assume ideal diodes and the starting state of the counter as 000. If output high is 1 V and output low is 0 V, the current I (in mA) flowing through the 50 Ω […]
Q. The diodes given in the circuit are ideal. At t = 60 ms, Vpq (in Volts) is____ Ans: 200
The diodes given in the circuit are ideal. At t = 60 ms, Vpq (in Volts) is Read More »
Q. In the given circuit, assume that the opamp is ideal and the transistor has a b of 20. The current Io (in mA) flowing through the load ZL is _ . Ans: 300
In the given circuit, assume that the opamp is ideal and the transistor has a b of 20 Read More »
Q. An ideal square wave with period of 20 ms shown in the figure, is passed through an ideal low pass filter with cut-off frequency 120 Hz. Which of the following is an accurate description of the output? A. Output is zero. B. Output consists of both 50 Hz and 100 Hz frequency components. C.
Q. Two periodic signals 𝑥(𝑡) and 𝑦(𝑡) have the same fundamental period of 3 seconds. Consider the signal 𝑧(𝑡) = 𝑥(−𝑡) + 𝑦(2𝑡 + 1). The fundamental period of 𝑧(𝑡) in seconds is (A) 1 (B) 1.5 (C) 2 (D) 3 Ans: 3 Sol:
Two periodic signals 𝑥(𝑡) and 𝑦(𝑡) have the same fundamental period of 3 seconds Read More »
Q. A coil having an impedance of (10 + j100) Ω is connected in parallel to a variable capacitor as shown in figure. Keeping the excitation frequency unchanged, the value of the capacitor is changed so that parallel resonance occurs. The impedance across terminals p-q at resonance (in Ω) is Ans: 1009 – 1011
Q. The Thevenin equivalent circuit representation across terminals p-q of the circuit shown in the figure is a (A) 1 V source in series with 150 kΩ (B) 1 V source in parallel with 100 kΩ (C) 2 V source in series with 150 kΩ (D) 2 V source in parallel with 200 kΩ Ans:
Q. A series R-C circuit is excited by a 1Ð0 V sinusoidal ac voltage source. The locus diagram of the phasor current 𝐼= (x + jy) A, when C is varied, while keeping R fixed, is Ans: Option 1
A series R-C circuit is excited by a 1Ð0 V sinusoidal ac voltage source Read More »
Q. Consider two functions 𝑓(𝑥) = (𝑥 − 2)2 and 𝑔(𝑥) = 2𝑥 − 1, where 𝑥 is real. The smallest value of 𝑥 for which 𝑓(𝑥) = 𝑔(𝑥) 𝑖𝑠 __________. Ans: 1
Consider two functions 𝑓(𝑥) = (𝑥 − 2)2 and 𝑔(𝑥) = 2𝑥 − 1, where 𝑥 is real Read More »
Q. 𝑋 and 𝑌 are two independent random variables with variances 1 and 2, respectively. Let 𝑍 = 𝑋 − 𝑌. The variance of 𝑍 is (A) 0 (B) 1 (C) 2 (D) 3 Ans: 3
𝑋 and 𝑌 are two independent random variables with variances 1 and 2, respectively Read More »
