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problem 1: Why is the screen of a CRT coated with the phosphor?

problem 2: Why are the inner walls of a CRT between neck and screen coated with the conducting material?

problem 3: How is phase difference between the two voltages of similar frequency measured with a CRO?

problem 4: How is the frequency of a voltage signal measured with CRO?

problem 5: How is an ac voltage measured with the CRO?

problem 6: How is iron losses measured with the CRO?

problem 7: Describe the problems related with measurement of resistance, inductance and the capacitance at high frequencies.

problem 8: describe the resonance process for measurement of inductance at high frequencies. Describe the suppositions made. How is the effect of additional capacitances in the tuning capacitor taken care of?

problem 9: describe the method of measurement of capacitance at high frequencies by using the resonance method.

problem 10: Describe the following two techniques of measurement of effective resistance of a coil at high frequencies:

a) Resistance variation method
b) Reactance variation method 

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M97589

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