Bissoy.com
Doctors Medicines MCQs Q&A

Class C is an amplifier whose output current flows for

Class C is an amplifier whose output current flows for Correct Answer less than one-half the entire input cycle

  • Class C power amplifier is a type of amplifier where the active element (transistor) conduct for less than one-half cycle of the input signal.
  • Less than one-half cycle means the conduction angle is less than 180° and its typical value is 80° to 120°.
  • The reduced conduction angle improves the efficiency to a great extends but causes a lot of distortion.
  • The theoretical maximum efficiency of a Class C amplifier is around 90%.
  • In a Class C Amplifier efficiency and distortion, both are maximum.

[ alt="26 June 1" src="//storage.googleapis.com/tb-img/production/19/08/26%20June_1.png" style="width: 160px; height: 46px;">

Class

Class-A

Class-B

Class-C

Class-AB

Operating cycle

360°

180°

Less than 180°

More than 180° and less than 360°

Position of Q

Centre

On X-axis

Below X-axis

Above X-axis

Efficiency

25% or 50%

78.5%

High (almost 100 %)

50 % to 78.5 %

Distortion

Absent

Present more than class-A

Highest

Present less than class

 

Related Questions

There are five classes class 1, class 2, class 3, class 4 and class 5 in a school. They are one above the other. Class 1 is at the bottom, then class 2 above it and so on. Five videos M1, M2, M3, M4 and M5 are displayed in these given classes. Only one video is displayed in a particular class. Each video is displayed only one time. Video M5 is displayed at an even numbered class. Video M2 is displayed at class 1. Video M1 is displayed at the class just below M5. Video M4 is not displayed at even numbered class. Which of the following statement is not correct?
Consider the following statements regarding Thyristor: 1. It conducts when forward biased and positive current flows through the gate 2. It conducts when forward biased and negative current flows through the gate 3. It commutates when reverse biased and negative current flows through the gate 4. It commutates when the gate current is withdrawn Which of these statement(s) is/are correct?
Given below are three quantities named A, B and C. Based on the given information, determine the relation among the three quantities. Total number of pupils in three classes of a school is 1288. The ratio of children in three classes X, Y, Z is 39 : 64 : 58. In class X number of boys are 26 less than number of girls. Number of boys in class Y is 67.83% more than the number of boys in class X. And, girls in class Z are 25.36% less than the number of girls in class Y. (In calculating number of boys and girls, the decimal value must be rounded off to nearest whole number). Quantity A: Number of boys in class Z. Quantity B: Number of girls in class X. Quantity C: Number of girls in class Y.
Which two classes use the Shape class correctly?
A. public class Circle implements Shape { private int radius; }B. public abstract class Circle extends Shape { private int radius; }C. public class Circle extends Shape { private int radius; public void draw(); }D. public abstract class Circle implements Shape { private int radius; public void draw(); }E. public class Circle extends Shape { private int radius; public void draw() { /* code here */ } }F. public abstract class Circle implements Shape { private int radius; public void draw() { /* code here */ } }
A river connects two towns A and B. It flows 37 miles South from town A, then it turns West and flows 23 miles, then it turns North and flows 40 miles, then it turns to its right and flows 23 miles to reach town B. Where is town A with respect to town B?
A river connects two towns A and B. It flows 37 miles South from town A, then it turns West and flows 23 miles, then it turns North and flows 40 miles, then it turns to its right and flows 23 miles to reach town B. Where is town A with respect to town B?
“What is the different between height and radius of solid cylinder?” Which of the following option is sufficient alone to find the answer? A) A solid cylinder is made by melting a solid sphere. The radius of cylinder is 3 times the radius of a circle whose area is 154 sq.m. Height of cylinder is equal to the height of cone whose volume is 2772 cubic meters. B) Area of a rectangle whose longer side is ¾ times the radius of a solid cylinder, is 168 sq.m and, Volume of solid cylinder is 2772 cubic meters and its height is 18 m. C) A metallic cone of radius 15m and height 35m is melted into the solid cylinder of radius equal to the radius of a circle whose area is equal to the area of rectangle whose sides are in the ratio 4 : 3 respectively. D) The curved surface area of the solid cylinder is 3 time the surface area of a sphere of radius 7m and height of cylinder is equal to the height of a metallic cone whose curved surface area is 308 sq.m. 
An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ & Output resistance of 2.5 kΩ.The input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is
Which amplifier whose output current flows for the entire cycle?
The given chart shows the number of students in Class 4, Class 5, Class 6 and Class 7 who got first class, second class and failed in the final examinations. Which class has the least number of students who passed?