Electrical Engineering Answers

 A truck proceeds to be able to pass another truck. Its speed increases from 50 to 100 km/h in 4 seconds. What is its average acceleration?

Two runners are competing in a 400-meter dash. The first run at 6 m/s and maintains this speed. The second runner starts at 10 m/s and decelerates at 1/8 m/s². Who will finish first? What will be their time difference?

Calculate the divergence and Curl, of the following functions

a. V= x2 i+3xy^

2

j -2xyz k

b. V=xyi+2yz j+3zx k

c. V= y2

i +(2xy+z2

)j+ 2yz k , where i , j , k are unit vectors along x, y and z axis

Adding numbers victor ha an array of size n. He loves to play with these n numbers each numbers. Plays with them he pics up any two consecutive numbers and adds them on adding both numbers it costs him k*(sum of both numbers) find all minimum cost of adding all the numbers in the array. Input1:size of array,

Input2:element of the array

Input3:value of K

A copper wire of unknown length has a diameter of 0.25 in. and a resistance of 0.28 ohm. By several successive passes through drawing dies the diameter of the wire is reduced to 0.05 in. Assuming that the resistivity of the copper remains unchanged in the drawing process, calculate the resistance of the of the reduced-size wire

A single layer of No. 24 WGA (dia=0.0201) commercial iron wire is wound over a ceramic tube whose diameter is 3.25 in if the total wire resistance is 41 ohms, determine the number of turns.

 Q3.  Radiation falls on a semiconductor specimen which is uniformly illuminated, and a steady-state is reached. At t = 0 the light is turned off. Derive and sketch the minority-carrier concentration as a function of time for t > 0.

Q1.Draw and explain CE configuration with the help of its input and output characteristics. Mention the different region of operation of CB configuration in the output characteristic.

Q2. 2. A 220 V, 50 Hz ac voltage is applied  to  primary  side  of  10:1  stepdown transformer, which is used in bridge rectifier having load resistance of 1 KΩ. Calculate (i) peak, average & RMS value of load current (ii) dc output voltage (iii) dc output power (iv) PIV of each diode (v) efficiency (vi) output frequency. (Assume diodes to be ideal diode)