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Electronic signals are used by almost all measurement and control systems to transfer information. Much of this data is in the form of analogue voltages, which are prone to the effects of noise and interference.
Interference is picked up from external sources present in the local environment. These sources are usually beyond the control of the systems engineer and so their effects must be moderated by careful earthing and shielding. Noise is generated within the circuits, and components themselves, and by good design may be reduced but not eliminated.
Answer the following questions.
1 Convert the following gains to dB.
a) power 3, 17, 854
b) voltage 5, 28, 36500
2 Convert the following gains to arithmetic ones
a. power 3 dB , 45 dB , 126 dB
b. voltage 2 dB , 35 dB , 126 dB
3 Express the following powers in dBm:
15 mW, 165mW, 10 µW
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why DC motors use field winding instead of armature winding
Q. Consider the circuit shown in Figure. (a) Given v(t) = 10e -t V, find the current source is(t) needed. (b) Given i(t) = 10e -t A, find the voltage source v (t) needed.
Consider the circuit of Figure (a) with v S (t) = 10 cos ωt. Use the piecewise-linear model of the diode with a threshold voltage of 0.6 V and a forward resistance of 0.5 to dete
Commercial Losses in Electrical Systems Commercial losses are caused by pilferage, theft, defective meters, and errors in meter reading and in estimating un-metered supply of
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List three characteristics of lines of magnetic flux
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