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Which of the following landline telemetry systems are available? 1. Voltage telemetry systems 2. Current telemetry systems 3. Position telemetry systems 4. Resistive telemetry systems
Which of the following statements with regard to Almond's characterisation of political system are correct? (i) All political systems have political structures. (ii) All political systems do not perform the same functions. (iii) All political systems are not multi-functional. (iv) All political systems are mixed systems in the cultural sense. Choose the correct answer from the code given below :
In an AM system receiver. the mixer translates the carrier frequency fc to a fixed intermediate frequency of 450 kHz. Given a broadcast signal of frequency 900 kHz. What is the corresponding image frequency when a superhetrodyne receiver is employed with local oscillator frequency greater than the broadcast signal frequency?
Consider the following statements regarding modulation : 1. The communication systems, where a weak signal is transmitted by the use of a modulation is essential in carrier signal. 2. When the frequency of the high frequency signal is varied in accordance with the intensity of the low-frequency weak signal, the modulation is said to be frequency modulation. 3. The process of recovering original baseband signal from the modulated signal is called phase modulation. Which of the above statements are correct ? 
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.
Routers operate at layer _____. LAN switches operate at layer ______. Ethernet hubs operate at layer _____. Word processing operates at layer _______.
In active power and frequency control, a. Frequency should remain constant b. A considerable drop in frequency could result in low magnetizing currents in induction motors and transformers. c. The frequency of a system is dependent on reactive power balance. d. Relatively closed control of frequency ensures constancy of the speed of induction motors. Which of the above statements are incorrect?
The different age group people go for a morning walk. The age of 20 people who go for a morning walk is as follows: 19, 15, 34, 45, 69, 74, 24, 67, 77, 89, 91, 45, 65, 35, 56, 67, 55, 23, 78, 52 The Grouped frequency distribution table of above will be: (A)  S. No Class Frequency 1 0-20 2 2 20-40 4 3 40-60 5 4 60-80 7 5 80-100 2 (B)  S. No Class Frequency 1 0-20 3 2 20-40 3 3 40-60 5 4 60-80 6 5 80-100 3 (C) S. No Class Frequency 1 0-20 2 2 20-40 4 3 40-60 5 4 60-80 5 5 80-100 4 (D) S. No Class Frequency 1 0-20 2 2 20-40 7 3 40-60 2 4 60-80 7 5 80-100 2
A source of unknown frequency gives 4 beats / s, when sounded with a source of known frequency 250 Hz. The second harmonic of the source of unknown frequency gives five beats per second, when sounded with a source of frequency 513 Hz. The unknown frequency is:
The frequency response of the filter in the stop band. i. Decreases with increase in frequency ii. Increase with increase in frequency iii. Decreases with decrease in frequency iv. Increases with decrease in frequency