If both Assertion and Reason are true and the Reason is correct explanation of the Assertion
If both Assertion and Reason are true but Reason is not correct explanation of the Assertion
If Assertion is true but Reason is false
If Assertion is false but the Reason is true

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

Book:

Master Resource Book in JEE Main Physics (Arihant)

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Question 4

Easy

If an emitter current is changed by

4 mA

, the collector current changes by

3.5 mA

. The value of

β

will be :

7
0.5
0.875
3.5

Topic:

Semiconductor Electronics: Materials, Devices and Simple Circuits

Exam:

JEE Mains 2021 Feb 24 Shift 1

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Practice questions on similar concepts asked by Filo students

Question 1

5.8D Figure P5.8D shows a device for pumping water without the use of an electrical or fuel input. The container (1) holds a suitable liquid working substance separated from a quantity of air by a flexible bladder (2). During the daytime, heat transfer from the warm surroundings vaporizes some of the liquid, thereby displacing the bladder and forcing air through the pipe (3) into the top of the chamber (4) below. As the air enters the lower chamber, it pushes against the top of the piston (5). The displacement of the piston pumps water from the chamber through the lift pipe (6) and into the collection tank (7). At night, heat transfer to the cooler surroundings causes the vapor to condense, thereby restoring the bladder to its original position and recharging the lower chamber. Critically evaluate this device for pumping water. Specify a suitable working substance. Does the device operate in a thermodynamic power cycle? If so, estimate the range of thermal efficiencies that might be expected. Propose a means for pumping water with this type of device more than once a day. Write a report of your findings. Working substance:

Trapped air

Topic:

Physics

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Question 2

Question 24 1.6 points Points A, B, C, and D are located in a uniform electric field E pointing along the y direction as shown in the figure. The line segment AC is parallel to the y-axis and the segment CB is parallel to the x-axis. Which of the following statement(s) is/are true regarding the electric potential at the given points? I: VD < VA II: VC = VB III: Vp depends on the x and y coordinates of point D. IV: The energy required to move a charged particle from A to D depends on the path between the two points. HD 1080 Acer

Topic:

Physics

View solution

Question 3

Find the new weights when the net illustrated in Figure 6.12 is presented with the input pattern (-1, 1) and the target output is 0.8. Use a learning rate of a = 0.25 and the bipolar sigmoid activation function. A 0.4 0.7 0.3 0.6 X2 Figure 6.12: Neural network for Exercises 6.1-6.5

Topic:

Physics

View solution

Question 4

The weights of two children sitting at ends

A

and

B

of a seesaw are84 lb and 64 lb, respectively. Where should a third child sit so thatthe resultant of the weights of the three children will pass through

C

if she weighs

(a) 60

Ib,

(b) 52

Ib?(Figure cant copy)

Topic:

Physics

View solution

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Question Text	The output of a 2 input NAND gate is fed to a NOT gate. The truth table for the output of the combination for all possible inputs of $A$ and $B$ is
Topic	Semiconductor Electronics: Materials, Devices and Simple Circuits
Subject	Physics
Class	Class 12
Answer Type	Text solution:1
Upvotes	4