GATE Electronics and Communication Test Paper 2 Online

1. A differential amplifier has R_L = 10 k (for both collectors) h_re = 1k, R_e = 50k, h_fe = 100. The common mode gain is given by:

2. The Fourier transform of unit step function is given by:

3. N contains sources and resistors. I is given for different values of R
I = 1 for R = 2
I = 3/2 for R = 1
Value of 1 for R = 0 is given by

4. A rectangular pulse of duration T is applied to a filter matched to this input. The output of the filter is a:

5. High cut-off frequency can be expected in case of:

6. The given ckt represents a:

7. Bridge rectifiers are preferred because:

8. Foe successive approximation, with N output bits number of clock required is:

9. How many and what are the machine cycles needed for execution of XTHL?

10. If the conductivity of the copper is 5.8 x 10⁷ mho/m and its relative permeability and permittivity is unity, then its refractive index at 10 MHz will be:

11. How many 1/0 ports can be accessed by memory mapped method?

12. The diffusion capacitance of a forward biased p-n junction diode varies:

13. The Thevenin equivalent voltage V_TH appearing between the terminals A and B of the network shown in the figure in given by:

14. In the given below.
S is open . V₀ = 6, I₀ = 0
When Sis closed at t = 0. The values of i and di/dt at t = 0 are given by:

15. For a Schmitt trigger, the upper and lower trip voltages are 3V and 1V; and high and low states are 15V and 2V. The output for sinusoidal input of 10V peak will lie between

16. Schottky clamping is restored in TTL gates:

17. A constant N - circle having centre at (-1/2, jO) in the G-plane, represents the phase angle equal to:

18. A coil with a 100 X_L at 3 MHz and 100Ωinternal resistance has a value of Q

19. In the ckt shown β = 99, V_EB = 0.6. The operating point V_C, I_c are given by

20. In the given ckt:

v = cos t. The current I is given by:

21. The advantage of using a dual slope ADC in a digital voltmeter is that

22. Te ckt is that of

23. What should be the oscillator frequency for tunning in 90 MHz on a FM radio with 110.7 MH_z IF?

24. The Fourier transform of a real valued time signal has ...... symmetry

25. An instruction used to get the carry flag in a computer can be classified as:

26. ∇²H = μ₀ε₀ ∂²H/∂+2 is a:

27. The trigonometrical Fourier series of an even function of time does not have the

28. The positive number 0.0001 is to subtracted from 0.0011. the arithmetic unit of a computer would perform by adding:

29.

30. The number of link branches in a graph of 6 nodes and 9 branches is:

31. Current marked I is given by:

32. In a bipolar transistor at room temperature, of the emitter current is doubled the voltage across its base-emitter function.

33. In a transistor amplifier, I_CQ = 5 mA and ac collector current of 1 mA peak flows into a load of 1kΩ. The average dc power dissipated in the load is:

34. The power spectral density a deterministic signal is given by [sin(f)/f²] where f is frequency. The auto correlation function of this signal in the time domain is:

35. The phase velocity v in a transmission line is:

36. Which of the following steps will help in frequency stablisation of an oscillator?

37. Given for an FET, gm = 9.5 mA/volt, total capacitance = 500 pF. For a voltage gain of -30 the bandwidth will be:

38. Flat top sampling of low pass signals

39. For the resonance circuit shown. ω₀ = 10⁵ , Q = 50, R = 400 Ω. The value of C is given by

40. The ckt shown below is that of: