Q. A 300 V, 5A, 0.2 pf low power factor wattmeter is used to measure the power consumed by a load. The wattmeter scale has 150 divisions and the pointer is on the 100th division. The power consumed by the load (in Watts) is . Ans: 200 Sol: Given that, voltage (V) = 300 V […]
Q. A voltage of 6 cos(100πt) V is fed as y-input to a CRO. The waveform seen on the screen of the CRO is shown in the figure. The Y and X axes settings for the CRO are respectively (A) 1 V/div and 1 ms/div (B) 1 V/div and 2 ms/div (C) 2 V/div and
A voltage of 6 cos(100πt) V is fed as y-input to a CRO Read More »
Q. The number of comparators required for implementing an 8-bit flash analog-to-digital converter is (A) 8 (B) 128 (C) 255 (D) 256 Ans: 255
Q. The representation of the decimal number (27.625)10 in base-2 number system is (A) 11011.110 (B) 11101.101 (C) 11011.101 (D) 10111.110 Ans: 11011.101
The representation of the decimal number (27.625)10 in base-2 number system is Read More »
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
