Use the DC Construction kit (the PHET simulator) to build a
simple circuit to perform the following task:

You are asked to use a single resistor and a 110 V DC battery
for the purpose of boiling a liter of water (4,184 Joule/Kg*degree
Celsius), with a staring temperature of 20 C, in exactly 4
minutes.

In: Electrical Engineering

choose the correct answer:

1-Use of occupancy sensors in a typical conference room
application will accomplish which of the following:

A.Reduce monthly lighting operating hours.

B.Increase lamp calendar life in hours (not operating
hours)

c. Reduce group re - lamping fixtures.

D.a& b

2-A building has 500 lighting fixtures with operating power of
200 Watt / fixture. The lighting system operates 3,500 hours per
year. An energy audit results in retrofit with 500 fixtures with
operating power of 120 Watt / fixture and use of occupancy sensors
that reduce lighting operation to 2,000 hours per year. If energy
costs a flat rate of $ 0.10 per kWh, how much will the project save
annually?

A-$ 12000

B-$ 14000

C-$ 21000

D-$ 23000

3-facility has a demand ratchet rate structure of 75 % . In
the current billing month , the actual metered demand of the
facility was 650 kW . During the previous 11 months , the highest
peak demand was 940 kW . How much greater than the actual demand
will the billed demand be ?

a . 15 kW

b. 55 kW

c. 453 kW

d . 650 kW

In: Electrical Engineering

write 500 words about electric circuits

In: Electrical Engineering

1. What is needed for providing an inductor at the output of a SMPS? List out the important requirements of the inductor at the output of a SMPS power supply.

2. Analogue PWM wave form can be created by combining which of the following:

- A saw- tooth waveform and a square wave form
- A saw- tooth waveform and a sinusoidal wave form
- A saw- tooth waveform and a rectangular wave form
- A sinusoidal wave form and a rectangular wave form
- A sinusoidal wave form and a square wave form

In: Electrical Engineering

why is the term nonperiodic energy signal redundent

In: Electrical Engineering

PROBLEM 2

(a) Do operation 75.38 - 18.62 in binary using two's
complement. Use for the 6 bit fractional part

(b) Convert the resulting expression to decimal, and say how
much is the absolute error obtained in the operation

In: Electrical Engineering

Flip-flops:

a) Make a asyncronous MOD 12 flip-flop up counter circuit

b) Make a syncronous MOD 14 flip-flop up counter circuit

c) Each flip-flop has the same propagation delay, which is 10ms.
Calculate the maximum clock frequency of the circuit in questions
(a) and (b)

In: Electrical Engineering

Please answer both the questions.

1 a) Design two bits comparators using Verilog description language

Note: Design means RTL code and Testbench covering all possible corner cases)

b)

How many latches will result when the following code is synthesized? Assume B is 4-bits long.

always@(state)

begin

case(state)

2’b00: B = 5;

2’b01: B = 3;

2’b10: B = 0;

endcase

end

In: Electrical Engineering

explain which method is the best Newton-Rhapson or Fast-Decoupled Method in

1) Total time needed for each method to converged

2) Accuracy of the solutions found

In: Electrical Engineering

The voltage across a 5 μF capacitor is known to be vc=500te^(−2500t) V for t≥0, where t is in seconds.

a.) Find the current through the capacitor for t>0. Assume the passive sign convention.

b.) Find the power at the terminals of the capacitor when t = 150 μs.

c.) Is the capacitor absorbing or delivering power at t = 150 μs?

d.) Find the energy stored in the capacitor at t = 150 μs.

e.) Find the maximum energy stored in the capacitor.

f.) Find the time when the maximum energy stored in the capacitor occurs.

In: Electrical Engineering

Draw and explain working of BJT monostable multivibrator. Draw the voltage wave form of Base 1,Base 2,collector 1and collector 2.calculate the delay time T forwhich the circuit will remain in quasistable-state after triggering (12 Mark)

In: Electrical Engineering

What is the purpose of a pull-up resistor? Explain when this is needed and the consequences of its omission.

In: Electrical Engineering

Write a program in Arduino that, when it takes in a voltage range (0 to 5 volts), gives a corresponding servo motor angle with a range from 0 to 180 degrees.

In: Electrical Engineering

The set of AND and OR gates is a functionally complete set of gates.

a)true

b)false

In: Electrical Engineering