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Physics: Post your doubts here!

Tabi Sheikh

Tabi Sheikh

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gary221

gary221

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sumaiyarox:) said:
yup plzz..n s11 41 too:)
Click to expand...

9 a) Function of comparator:
It compares the two input voltages (V+ n V-) and produces an output based on the difference of the voltages. ie output n polarity both depend on which is greater, the negative input or the positive.

b i) For output voltage to be 0, V+ shud equal V-
So, resistance of the thermistor shud equal resistance X
At 10 °C, thermistor resistance = 2.5 kΩ
So, resistance of X = 2.5 kΩ.
ii) At 5 °C, thermistor resistance = 3.1 kΩ ie more thn X ---->potential divider = V- will be greater thn V+ = Vout will be negative (-9 V)
At 20 °C, thermistor resistance = 1.78 kΩ ie less thn X ----> V- will be lesser thn V+ = Vout will be positive (+9.0 V)
Vout switches between negative and positive at 10 °C. As both V- n V+ will be the same.
 
unseen95

unseen95

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Tabi Sheikh said:
the maxima will be produce where both waves are in phase or the meeting point of two wave fronts and the minima are formed where a single wave is passing through the trough of other.
Click to expand...
i know the theory a figure would be helpful :confused:
 
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