Quiz 3_ENGR 70

Ohm's Law states that the electric current flowing though a ________ is directly proportional to the ________. Select one: a. closed circuit --- total resistance b. closed circuit --- switch resistance c. open circuit --- supply voltage d. closed circuit --- supply voltage

During lightning, if the current starts flowing through the are, it _______ even after the lightning disappears. a. infinity b. remains c. will be very very low d. zeroes

Suppose the current in this circuit is I = -35 A. The voltage drop across each circuit element is as given in the table below. From this information, determine, for each of these circuit elements, (i) whether an active or passive sign convention is being used for that element, (ii) whether that element is absorbing or producing a net (positive) amount of electrical power. In each answer box within the table below, type the correct choice from among the bold-faced words above. - A A B C A + с B + V₂ Circuit element Voltage drop Sign convention? Absorbing or producing net electrical power? -5 V -6 V 1 V -

In the figure, the ideal batteries have emfs ℰ1 = 25.0 V and ℰ2 = 0.500ℰ1, and the resistances are each 2.14 Ω. (a) What is the current in resistor 2? ______________A(b) What is the current in resistor 3? ______________A (please show the units when working through the problem so that I can follow it easier)

2. Task: Simple Wiring Connection Layout of your House a) Make a simple wiring connection layout of your own house like the image shown below. The layout will be according to your house and the equipment used in your house. Mention the total load and current drawn by each room/spaces and the recommended size of cables to be used beside the cable lines. The following image is just an example and it is not complete. You may use standard symbols of the equipment or draw with appropriate label, i.e. fan, light, switchboard, MCB ete. b) Add images of equipment used in your house with this question.

A cone meter rod 2 cm diameter is drawn until its resistance is 100 times the initialresistance. Its length afterward is _________.

11. When SW2 is closed, the motor will spin and D1 will light. The current through 1.______ will flow through the motor and the series of R3,R4, and D1 The current through the motor will be 2.________ the current through the series of R3, R4, and D1. This is because 3.______ Blank choices: 1. a.) R2 b.) R1 and R2 c.) R1 2. a.) less than b.) greater than c.) the same as 3. a.) parallel paths divide current proportionally between them b.) parallel paths divide voltage, not current c.) the potential difference across the paths is the same, so it drives the same current d.) parallel paths divide current equally between them

What follows is a numeric fill in the blank question with 3 blanks. Figure 1 shows the three phases V-t graph in Turkey. Please write the indicated values with their units in boxes and Voltage - time function of each phase in table below. Please write the units in the second box. 1= _______________ V 2=  ________________ms 3=  _______________ms

Make a research question regarding with these topics A. Solar Powered Light Post B. Underground Cables C. Covered Bike Lane of Solar Panels

Estimate the length of conduit to perform the next bends. EMT will be bend using a hand bender. Provide your answer in inches (just the number) using up to 2 decimals. The picture shows two panels connected by a back-to-back 23.5" stubs EMT 3/4" 6.25 ft P

6.a. Extreme _______ may cause some nonmetallic conduits to become brittle and therefore moresusceptible to damage from physical contact.A. coldB. corrosionC. voltageD. heat6.b. Snap switches are permitted to be grouped or ganged in an enclosure provided the voltage between theadjacent snap switches does not exceed ___ V.A. 400B. 300C. 200D. 100

A battery with E = 39 V and negligible internal resistance is connected to a voltage conductor as shown in the figure.R1=220 R2=68  a) What is the voltage U if no external load is connected? ____________ b) What is the current between A and B if these connections are short-circuited.____________ c) What is U if a load with a resistance of 68 is connected between A and B?____________ d) What is the power of the circuit if a load with a resistance of 68 Ω is connected between A and B? ____________

Q4. Explain the operating principle of the circuit breaker and list the merits and demerits of the following circuit breakers: (10 Mark) (i) Air circuit breaker (ii) Oil circuit breaker (iii) SF6 circuit breaker (iv) Vacuum circuit breaker

choose the correct answer In solar power plant, the cost of concentrating collector is more than flat platecollector.    TRUE or FALSE

Electrical plants Define the terms "Main column ." " Line ." " Protection earth " and " Operating earth

Don't copy. Need zero plagiarism answer and correct answer. I will rate.

The resistance of a wire is 126.48 ohms at 1000C  and 100 ohms at 300C. The temperature coefficient of this wire at 00C is ____________per C0.

Question 2 Not yet answered Marked out of 1 P Flag question Which one of the following is not a subsystem of solar energy plant? a. Power generation from water turbine generator O b. Energy conversion in the solar concentrators c. Heat energy storage O d. Water circulation inside the collector

QUESTION -7 In the following figure a power line to drive a Load is represented. The wires are made of copper and shaped as solid round. Under the following requirementsi. The length of each positive voltage and ground wire is 30ft.ii. The maximum allowable resistance of each power line is 0.006 Ω.iii. The maximum allowable current is 110A for each power line.Find the followinga) Using the AWG table (given in this exam sheet) find the suitable cable type with minimum size.b) Considering power supply as E=24V and current drawn by the load as I=12A, find the total voltage drop over the cables and voltage difference over the Load.

The circuit diagram below is for a robot that walks around the room. It is designed to stop walking when certain conditions are met.   a) In which of the following cases will the robot start walking? i. The robot is far from the wall. ii. The battery status is good. iii. The room lights are on. iv. Both i and ii. v. i, ii, and iii. vi. ii and iii, but not i. vii. i and iii, but not ii.  b) Explain what happens to the robot if the light is turned off. ______________________________________________________________________________ ______________________________________________________________________________  c) If you remove the light sensor and the AND gate attached to it from the circuit from the circuit, which of the following are true and which are false? i. The robot will continue to walk with a low battery ii. The robot will stop walking if it is close to the wall iii. One of the remaining inputs (proximity sensor and battery status) is irrelevant to whether the robot walks or not.…

A copper bar has a length of (month) feet, width of (day) millimeters and thickness of (year) inches. What is the resistance of the bar? NOTE: Use the pattern of your birthday if 09-20-1994 format as Month-9, Day- 20, Year-94.

(c) Sketch a circuit diagram of a complete power conversion circuit that would be used to connect a solar PV array to the grid. Briefly describe its operation, including mention of the types of power electronic switches that might be used along with their voltage/current ratings. Please solve this with in 1 hour

In the generation of electricity, generating too little electricity will cause __________ and generating too much electricity will cause__________________ a. Blackout and brownout b. Brownout and blackout c. Lights on and lights out d. Lights out and lights on

Discuss the types of oil circuit breakers. Please write more answer

6. The “three-step” test method: a. Ensures an accurate result by taking a measurement three times. b. Requires three people, to independently measure a voltage. c. Means checking a meter on a known source, then making the actual measurement, then checking the meter again on the known source. d. Uses three meters as a “redundancy check.”

24   Voltmeter shows an error of 13 V for 356 V reading, the percentage accuracy of voltmeter is_______ % a. 3.65 b. 0.04 c. 13.00 d. 0.27