List requirements of good servo motors.

 i) The linear relationship in between electrical control signal and the rotor speed over a wide range.

ii) The inertia of rotor should be as low as possible.

iii) A servo motor must stop running without any time delay, if control signal is removed.

iv) For low inertia, it is designed with large length to diameter ratio for rotors, compared to its frame size. The rotor of servomotor has very small diameter.

v) It's response should be as fast as possible, for quickly changing error signal, it must react with good response. This is attain by keeping torque to weight ratio high.

vi) It should be easily reversible. 

vii) It should have linear torque speed channel.

viii)  It's operation should be stable without any oscillation or overshoot.

State disadvantage of single mode optical fiber

 Ans:-

i) The laser required are costly and can be used with only one cable at a time.

ii) The dependency on laser it means that single mode cables are less versatile and more limited in their applications.

iii) Single mode solution are often more expensive to deploy and operate since laser based equipment generate more heat.

State advantage of WDM

 Ans:-

i) To use the full capacity of the fiber optic cable by allowing multiple beams of light at different frequencies on the same fiber    optic cable.

ii) Full duplex transmission is possible.

iii) Easier to reconfigure.

iv) Optical components are similar and more reliable.

v) This could be the best approach, as it is simple to implement.

vi) High security.

vii) Various optical channel can support different transmission formats.

3x^2-3 =5x solve this

 Ans:-

3x^2 - 3 = 5x 

Now we rearranging this expression ax2 + bx + c = 0 in that manner than we get,

3x^2 - 3 - 5x = 0

∴  3x^2 - 5x - 3 = 0

Now we solve this sum by quadratic formula,

1+1-12-12-67-972= What is the answer ?

 Ans:-

1+1-12-12-67-972 = ?

we solved this problem by golden formula of plus and minus

( +, - ). In this formula -1 -1 = -2, 

                                 ∴    -3 -3 = -6,

                                 ∴     1 + 1 = 2, 

                                 ∴     3 + 3 = 6

  ∴  1 + 1 - 12 - 12 - 67 - 972

         ↓                    ↓                   

         2                -1063    

                    

∴       2 - 1063 = 1061

This is our required Ans:- 1061

Find the product of place value and face value of 9 in the year of Independence.

 Ans:-

Year of Independence is 1947

so that, the face value of 9 in 1947 is = 9 

    ∴   the place value of 9 in 1947 is  = 900

Now the product of place value and face value of 9 in 1947 is = 9 × 900

                                                                                                     =  8100

The product of place value and face value of 9 in the year of Independence is = 8100

The ratio of the length of a rectangle to its width is 5:2. If the length of rectangle is 40 cm, what is its width​

 Ans:

Ratio of length and width of rectangle must be in proportion to the actual length and width of the rectangle.

Let we consider width of rectangle be = x

Given:-

Ratio of  Length : Width is = 5 : 2 respectively

Actual Length is = 40 cm

Now we know that, they are in proportion, so we can write them as,

5 : 2 = 40 : x

∴ 5/2 = 40/x

Cross multiplying, we get

5x = 80

x = 16 cm

Therefore width of rectangle is 16 cm.

Expand this expression (p+q²)²​

 (p + q²)²​ 

We solved this expression by this formula (a + b)² = a² + 2ab + b²

(p + q²)²​ = p² + 2pq² + q4

so this is our required Ans:- p² + 2pq² + q4

Hope you will find this answer helpful..!!

There are how many types of electronics in the world ?

If we talk about electronics in the world, than I think that there is no limitation, because every day there new-new features updates we listening isn't ?.

Actually we can't define the limitations of electronics in the world.

But in current times, the types of electronics is,

1. Digital electronics
2. Analogue electronics
3. Microelectronics
4. Circuit design
5. Integrated circuits
6. Power electronics
7. Optoelectronics
8. Semiconductor devices
9. Embedded systems
10. Audio electronics
11. Telecommunications
12. Nanoelectronics
13. Bioelectronics