The safe operating area for the given transistor specifications using voltage and current linear scale.

Question

Choose the correct answer: 1-We avoid line starting of induction motor and use starter because... (A) It will run in reverse direction (B) It will pick up very high speed and may go out of step Motor takes five to seven times its full load current (D) Starting torque is very high 2-DOL starting of induction motors is usually restricted to........... A Low horsepower motors (D) High speed motors (B) Variable speed motors (C) High horsepower motors 3- The method which can be used for the speed control of induction motor from stator side is......... (A) V/f control (B) Controlling number of stator poles to control Ns (C) Adding rheostats in stator circuit All of these 4-In cumulatively cascade method for speed controlling, if PA is the number of poles of main motor and PB is the number of poles of auxiliary motor. Then the speed of the rotor B is given by 120f/PA + PB (B) 120f/PA-PB (C) 120f/PA 5-The crawling in the induction motor is caused by.............. (A) low voltage supply (B)…

Answer 1

Question

Chapter 8, Problem 8.1P

(a)

To determine

To sketch: The safe operating area for the given transistor specifications using voltage and current linear scale.

(b)

To determine

The value of RD for given voltages

To sketch: The load line that will produce maximum power in the transistor.

(c)

To determine

The maximum possible drain current for given voltages.

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