Explain the difference between Dynamometer type wattmeter and induction type wattmeter.
Dynamometer type wattmeter |
Induction type wattmeter |
| i. Working torque comparatively weaker. | i. Working torque comparatively stronger. |
| ii. Power consumption is low. | ii. Power consumption higher. |
| iii. Scale in uniform. | iii. Scale in uniform and long. |
| iv. Can be used both AC and DC system. | iv. Can be used only AC system. |
What is lissajous pattern? Explain how phase & frequency can be measured using this figures.
Why Schottky diodes are suitable for microwave region?
Derive the expression for overall noise figure of a cascaded system.
Write short notes on:
Draw and explain the square – law modulator.
What is meant by entropy of a source?
State and prove maximum power transfer theorem
Write short note on Magnetron Oscillator.
