GATE Electronics and Communication Test Paper 1 Online

1. An advantage of memory interlacing is that:

2. A filter is described by the circuit shown. If V_s(t) = A cos t + B cos 100 t, then V₀(t) = α A cos (t + θ) + β B cos (100 t +Φ) where     |α/β| is:

3. In a multiprocessor configuration, two co-processor are connected to the host 8086 processor. The two co-processor instruction sets:

4. If we use 3 bits in the instruction word to indicate if an index register is to be used and if necessary which one is to be used than the number of index register to be used in the machine will be:

5. Block search is used to locate a record in a ordered file consisting of N records. The optimum size of the block is:

6. The op-amp of figure has a very poor open loop voltage gain of 45 but otherwise it is ideal. The gain of the amplifier equals

7. In a 16-bit microprocessor words are stored in two consecutive memory locations. The entire word can be read in operations provided the first:

8. In integrated circuits electronics the basic universal gate is:

9. Which of the following is associated with optics:

10. The intrinsic impedance of a lossy dielectric medium is given by:

11. The impedance of a parallel RLC network is Z(s) = 5s/s²+0.5s+100. The the value of RLC respectively

12. Figure shows the circuit diagram of a wien bridge oscillator using the op-amp. The frequency of oscillator is given by f = 1/2π CR. To have the system oscillate the ratio R₂/R₁ should be:

13. A 10 mH inductor carries a sinusoidal current of 1 A rms at a frequency of 50 Hz. The average power dissipated by the inductor is:

14. Using the node method for circuit analysis, it is determined that the node voltage e_b = 10. The value for V, in the diagram shown, is:

15. The function of a multiplexer is:

16. An antenna, when radiating has a highly directional radiation pattern. When the antenna is receiving , its radiation pattern

17. In second order control system the value of the resonant peak will be unity when the damping ratio has a value of:

18. It R is the record, D is the recording density and G is the gap length, then the tap utilization is given by:

19. The input to a controller is:

20. An op-Amp has an offset voltage of 1 mV and is ideal in all other respect. If this op-amp is used in the circuit shown in figure, the output voltage will be (select the nearest value)

21. The impurity commonly used for realising the base region of a silicon n-p-n transistor is:

22. The add cycle-time of a serial adder of 10-bit words and 1 MHz clock is:

23. A communication channel with additive white Gaussian noise, has a bandwidth of 4 kHz and SNR of 15. Its channel capacity is:

24. The range of signed decimal numbers that can be represented by 6-bit is complement number is

25. In the circuit shown in figure. |V₀| = |V| for a certain set of values of ω, R and C.|V₀| will remain as V even if:

26. If for a silicon n-p-n transistor, the base to emitter voltage (V_BE) is 0.7 Vand the collector to base voltage (V_CB) is 0.2V. Then the transistor is operating in the:

27. Schottky clamping is resorted to in TTL gates:

28. At t = 0 the switch in the circuit shown is closed. The voltage V_C (t) shown across the capacitor for t ≥ 0, is:

29. An ideal op-amp is an ideal:

30. Assume the op-amp to be ideal. The current I through the 1 k-ohm resistor is:

31. The 120 V RMS circuit below has the following characteristics:

1. Phasor voltage across the capacitor V_C = 100/RωC + j(ω²LC - 1)
2. Phasor current in the inductor is I_L = 160^jπ/2/R + j(ωL - 1/ωC)
The power dissipated in the 2 ohm resistor is given by:

32. A system has a word length of 4 bits. If in this system negative numbers are represented by their two's complement then the range of numbers that can be represented by the word length is:

33. Two coils in differential connection have self-inductance of 2mH and 4 mH and mutual inductance of 0.15 mH. The equivalent inductance of the combination is:

34. The driving point impedance Z(s) = s²+2s+2/s²+s+1 can be realized as a:

35. Six independent low pass signal of bandwidth 3ω, ω, ω, 2ω, and 2ω Hz are to time division multiplexer on a common channel using PAM. To achieve this, the minimum transmission bandwidth of the channel should be ..... Hz

36. An electromagnetic field is said to be conservative when

37. For the circuit shown below, the switched was closed for a long time before t = 0, At t = 0 the switched is opened. The voltage v(t) across the register and inductor is as shown below

38. The noise figure of an amplifier is 3 dB, its noise temperature will be about:

39. In time division multiplexion:

40. The number 7 F 00 in Hexadecimal when multiplied by 16 is: