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Q. What is DTMF dialling?
DTMF dialling
1. Uses push buttons
2. Uses 8 different frequencies in pairs.
3. 16 different characters can be represented.
4. The frequencies used prevent generating of harmonics.
5. Each number is represented by a high signal & low signal=
Need for Modulation Recognition There are so many communication signals all available with different types of modulation and different frequencies. It is necessary to identify
Athree-phase,wye-connected, 220-V, 10-hp, 60- Hz, six-pole inductionmotor (using Figure 13.2.6 for notation) has the following parameters in ohms per phase referred to the stator:
Control Strategies Equation shows that output voltage V0 can be controlled through α and this duty cycle α can be varied by various strategies which are as follows.
Write a note on superconductors. Superconductors- The resistivity of most metals rises with increase in temperature and vice-versa. Some metals and chemical compounds are there
Calculate the monthly electric bill for TESTU. Metering is as follows: B 00,000 kWHr C 00,000 kVARHr D 0,000 kW peak demand Facilities Charge = $500
(a) Provide examples of intentional electromagnetic sources and examples of unintentional sources. (b) Describe the process of the formation of lightning. (c) Reduce each of
advantages and disadvantages of wein''s bridge
Q. Illustrate Signal attenuation? Signal attenuation in many channels can be offset by using amplifiers to boost the signal level during transmission. However, the amplifier al
Switching Characteristics The switching characteristic of an IGBT during turn on and turn off time all shown in the sum of delay time and rise time gives the total tur
Q. In the circuit shown in Figure with an ideal op amp, find v o as a function of v a and v b .
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