Chapter 5 Math Problems 2022 with Answers

The voltage across a resistance is 81.4 V. The voltage across a coil is 78.6 V. Find the voltage applied in the circuit (in V). (Round your answer to three significant digits.) A circuit in the form of a right triangle has sides labeled (in clockwise order) "Voltage across coil," "Voltage across resistance," and "Voltage applied." The angle between Voltage across coil and Voltage across resistance is a right angle.

1. Suppose you left a 150-W light bulb on continuously for one hour.  If the electricity generation and transmission efficiency is 80%, how much chemical energy (in KJ) was transferred from the power plant   2. To what height would an object have to be raised so that its gravitational potential energy would equal the kinetic energy it would possess if it were moving at 5 m/s? (Hint, Potential E = Kinetic E)   3. According to the table below, what is the overall efficiency of the process for converting Fuel cell energy into fluorescent lighting in your home? (Use average efficiency ratings, Assume an electrical transmission efficiency of 90%)

1: Suppose you have 10 light bulbs each of 100 Watt at your home. All of them are used for 6 hours every day. If the billing rate is 9 cent per unit (kilowatt-hr), how much do you have to pay in a month for those 10 bulbs?  2: An energy saving light bulb is saying that it would glow like a 60 watt bulb but its actual power consumption is 25 watts. If this light is turned on for 5 hours a day, how much is the saving in a year (consider billing rate is 10 cent per kilowatt-hr)?

Part (b): Watts, volts, and ohms are SI units that can be expressed in the 'base' SI units as follows: kg-m² 53 ohm = kg-m² $³.A21 watt = volt= bottle cm kg.m² $3.A' (Recall that 'A' is the abbreviation for an ampere.) Use algebra and the equation at the top of the page (P=V²/R) to show that the base SI units for watts equal the base SI units for volts²/ohms. You do not need any numbers in this algebraic exercise. Instead, treat each of the base SI units (kg, m, s, A) as if it were an algebra variable (like x or y). Start with the following equation and substitute the base SI units for watt, volt, and ohm: watt = volt² ohm

In a particular city, electrical energy costs $0.13 per kilowatt-hour( Round your answers, in dollars. to at least two decimal places.) a. How much does it cost to operate an old-style incandescent 40.0-W light bulb continously for 24 hours? b. A modern LED light bulb that emits as much visible light as a 40.0-W incandescent only draws 4.50 W of power. How much does it cost to operate this bulb for 24 hours? c. A particular electric oven requires a potential difference of 220 V and draws of 22.0 A of current when operating. How much does it cost to operate the oven for 4.30 hours?

A series DC motor has a resistance of 7 Q between its terminals. The motor runs at 1,259 rpm at 230 V taking a current of 12 A. What will be the speed at which the motor runs when it is connected in series with a 4 Q resistance, if there is no change in the supply voltage and current. Give your answer to two decimal places. 2

Computed Voltage, Volts Measured Voltage, Volts 1.8 V 1.8 V 8.25 V 7.8 V 10 V 9.6 V Computed Current, mA Measured Current, mA 17.5 mA 16.5 mA 17.5 mA 16.5 mA 17.5 mA 16.5 mA what factors contribute to the difference between the measured and calculated values of voltage and current?

DIAL 1 0 9 1 6 4 6 4 6 5 5 4 6 6 4 21. Based from the reading above in the electric meter, what is the value of the number of Kilowatt hour? a. 23825 b. 23824 c. 33825 d. 24825 22. If the previous reading is 22158, how many kilowatt-hour is consumed? a. 1667 b. 1668 c. 2668 d. 2667 23. If the cost of energy consumption is P 8.5 per kilowatt-hr, how much is the energy consumption in Pesos? a. P14,169.5 b. P 14, 178 C. P 22, 678 d. P22, 669.5 DIAL 5 O - A DIAL 4 2 3 O 87 7 7 DIAL 3 2 3 3 DIAL 2 88 7/7 2 3

What is the average wattmeter reading of one wattmeter method? O a. P1+P2 O b. Total power /2 Oc. P1-P2 O d. Total power/3

The cost to operate a clothes dryer for a year is $80.25. If the rate for electrical energy is 8.8¢/kWh, and the clothes  dryer is used for 700 hours in a year, what is the power rating of the clothes dryer?  Explain in detail how you got the answer using the formula provided.

An electric water heater uses 3,517 W from a 220 V AC line.  What is the peak current, in amps?

An electric circuit has a total of 68.8 Ohms of resistance, and is operated under a voltage of 78 volts. What is the power in this circuit?  Your answer should be in Watts, but do not write the unit, just the number.

An air conditioner, 6400 watts, is used only 4 months out of a year. On a typical day it is used only 5.0 hours. If the cost of electricity is 12 cents per kwh. How much does it cost to run this air conditioner for the 4 months (assume 30 days per month). 137 words English (United States) O Focus MacBook Pro

Our electric consumption is measured using kilowatt hour, kW h. On average, a simple Filipino household uses 248.1 kW h. Kilowatt hour, kW-h, is a unit of? O Energy Power O Force O Mass

Express your final answer in proper ENG notation and unit. Observe 2-5 decimal places. A 220V 600-watt electric coffee maker is used to make a total of 10 cups of coffee in 45 minutes. 1. Determine the following : a. Current consumed by the coffee maker and the electrical energy consumed in kWh b. the rise in temperature of the device. Note: specific heat of water =4200 J/kg-K 1 cup = 236 grams

An electric clothes dryer is rated at 4,000 W. How much energy does it use in 40 min?

1. What is the kinetic energy of 458N car which is moving at 75m/s? 2. A heater uses 26A when used in a 110-V line. If electric power costs 9.75 per kilo watt hour, the cost for running the heater for 12 hours is?

1. A meter reader determines that a business has consumed 3550 kWh of energy in two months. If electricity costs 10 cents per kilowatt-hour, how much will the bill be? Smartmeter 25000 then 28550 = difference 3550

An electric clothes dryer is rated at 2,300 W. How much energy does it use in 35 min?  kWh

6. Defibrillator machines are used to deliver an electric shock to the human heart in order to resuscitate an otherwise non-beating heart. It is estimated that a current as low as 17 mA (milliamp) through the heart is required to resuscitate. Using 100,000. 2 as the overall resistance, determine the output voltage required of a defibrillating device.

A primary transformer has a voltage of 240V and number of revolutions 500 turns, what is the secondary voltage if the number of turns is 25. The secondary voltage is ( _)V. Blank 1:

A transformer with a 120 V input voltage has 2000 turns of wire on the input coil and 197 turns of wire on the output coil. What is the output voltage?

a typical incandescent reading lamp runs at 60 watt. if it is left constantly, how much energy in Mega Joule is consumed per day? Note that 1 watt is equal to 1 joule per second. a. 5.18 b.0.518 c. 518 d. 51800

0.5 cm 1) Figure shows two parallel conductive plates coated on a conductive paper which was seperated to the equal squares with side length of 0.5 cm. The conductive plates are connected to a 18-V DC power supply. A a) If you connect a voltmeter between the points A and B, what will be the measured value of the potential difference between these points? b) Calculate the electric field between the parallel conductive plates. c) Draw the equipotential and electric field lines on your paper. 0.5 cm + + + + +

How much electric energy is delivered to a 60 W lightbulb if the bulb is left on for 2.5 hours?

The Code provides rules for the minimum number of receptacle outlets required in a dwelling unit. The minimum required receptacle outlets shall be in addition to receptacle outlets that are [Fill-in-the-blank]. Select one: a. all of these b. controlled by a wall switch for use as required illumination. c. part of a luminaire or appliance. d. located more than 5-1/2 ft above the floor.

An electric motor draws a current of 15.5 A in a 240 V circuit.  What is the power of this motor in Watts?

An electric generator converts ____. A. mechanical energy to heat energy B. electrical energy to heat energy C. electrical energy to mechanical energy D. mechanical energy to electrical energy