State whether the following statements are true or false a...

State whether the following statements are TRUE or FALSE: 1. A class A amplifier should be biased midway between saturation and cutoff. 2. The drain curves for a D-MOSFET are similar to those of a JFET when the MOS device is operating in the depletion mode. 3. The pinch-off voltage separates the ohmic and active regions for Vgs = Vgsoff. Fill in the blanks: 1. The voltage that turns on an E-MOSFET device is the threshold voltage. 2. The transfer characteristic curve is a graph of drain current versus gate-source voltage. 6. A certain class A power amplifier with an input signal power of 100 mW and power gain of 50. Then the power delivered to the load is.

Transcript

00:01 In this question we have given a block which is situated on a rough inclined plane and connected with a spring and we have given that the block is released from the rest with the spring in an stretch position now it is taught that the block moves 10 semi -down on the inclined before coming to the rest we have to find the coefficient of static friction between the block and the incline so first of all i'm writing the given data for this question we have given the mass of the block that is m is equal to 1 kg and the distance moved by the block that is x is equal to 10 semi or we have given the spring constant that is k is equal to 100 newton per meter i am going to and theta is equal to 45 degrees now i am going to draw the fbd of this diagram so this is the inclined plane here with an inclination of 45 degree and this is the block which is placed on this inclined plane and there is a which is connected with a spring and there is a spring whose spring constant is k and this is mass now i'm going to show the forces acting on this mass one is the weight that is acting vertically downward which is mg and the component of weight in this direction is mg sine theta and in this direction it is equals to mg cost theta there is a normal force acting that is n and one is the frictional force which is opposite to the motion that is equals to fission now we can say that the value of frictional force is given by that is f is equal to this is mu into n n is equal to this is m g cost theta now we can say that net force on the block is down the incline is given by that is equals to m g sine theta minus frictional force which is mu into m g cost theta now we can say that the work done at equilibrium this work done is equal to the potential energy of the spring.

02:29 So we can say that for equilibrium the work done by this force is equal to potential energy of stretch spring and this is equal to m force that is m g into sine theta minus mu into cost theta into x and this is equal to half k x square because the mass is moved by x distance.

03:02 So from here we can say that this can be written as 2 into m g sine theta minus mu into cost theta is equal to this is k x square.

03:17 Now sorry this is k x because one x is cancelled out...

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