Answered: A 900 mWH / 6V Battery supplies current…

A 900 mWH / 6V Battery supplies current to a 4V / 25mA white LED, how long it takes the battery to get out of juice? What is the value of the current limiting resistor to be used?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter9: Measuring Instruments

Section: Chapter Questions

Problem 5PP: 5. A digital voltmeter indicates a voltage of 2.5 V when 10 of current flow through a resistor....

See similar textbooks

Related questions

Q: Determine the resistance its proper source voltage of 110 V. of a 75-W lightbulb connected to

A: Given: Rating of bulbs, Rated power, P=75 W Source voltage, Vs=110 V

Q: f you have a 2pc battery and a 6w led, how many times does the battery discharge per hour? per…

A: In the above question 2pc will be 2c battery. It is a specification of battery. 2c battery =…

Q: A battery may be rated in ampere-hours (Ah). A lead-acid battery is rated at 160 Ah. (a) What is the…

Q: For a 2200 mAh, 12 V rechargeable battery: a. Assume charging current is 220 mA and there is a 40%…

A: Given: A 2200 mAh, 12 V rechargeable battery is given. The charging current is 220 mA and there is…

Q: car battery has a capacity of 75000 coulombs, and is charged by a battery charger having 7 A, if the…

Q: The internal resistance of a cell of emf 2.0 V is 0.1 Q. It is connected to a resistance of 3.9 Q.…

A: In this question we will find voltage across cell..

Q: An LED can be lit by a battery consists of 3 lemons that uses copper and zinc as electrodes. The…

A: The power of the given LED is, V=0.00097 kVI= 15 mAP=VIP=0.00097×103×15×10-3 WattP=0.01455 Watt The…

Q: An electric stove having a rating of 3kW is use to boil a 10Li of tap water (Initially at 200C and…

Q: 2. A 75W bulb draws a 680mA current. How much time will be required to pass a 30 Coulomb charge…

A: This question belongs to basic electrical . It is based on the concept of current flowing through…

Q: QI\ An ohmmeter has a moving coil of resistance 24 2 with 4mA full scale deflection current. The…

Q: Problem 3 A rechargeable flashlight battery is capable of delivering 90 mA for about 12 h. How much…

A: As we have given: i=90 mAt=12 hr Step 1: Calculate charge Q=i×t=90×10-3×12×60×60∴Q=3888 C

Q: Let us given a 12V, 60 Ah car battery. If the total energy of the battery reduces to 40% or less of…

A: Given: A 12V, 60 Ah car battery. Current drawn by alarming system is 100 mA. Battery cannot supply…

Q: determine the power dissipated when a curren of 10 mA flows through an appliance having a resistance…

A: Power dissipation = I2RGiven,I = 10mAR = 8KΩ

Q: The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 S,…

A: Given, Battery emf, ε=12 V. Internal resistance of battery, R=0.4 Ω.

Q: 2. VOLTS Vhens 30 20 10 What is the 50 reading? 2. 10 50 20 100 30 150 40 200 10 50 250 50 DCA Vf…

A: A voltmeter is an instrument used for measuring the voltage between two points in an electric…

Q: Q25. How long can a 1.5 V flashlight battery provide a current of 250 mA to light the bulb if the…

Q: Heat energy is often measured in calories and 1 calorie = 4.184 Joule. It is desired to design a…

A: In this question we will find current and power ratings..

Q: If 5V battery is only available, how many resistors should one picked and make series connection to…

A: Given:V=5VI=20 mA

Q: 120 ohms 1.80 ohms 36.0 ohms 18.0 ohms HHHHE

A: As image are not clear so the answer may be differ. Please go through method for solving these such…

Q: A rechargeable flashlight battery is capable of delivering 85 mA for about 12 h. How much charge can…

A: According to question we have to calculate how much energy can the battery deliver.

Q: A voltmeter have an apparent resistance of 35 K ohm Calculate the voltmeter resistance if the actual…

A: A voltmeter is a voltage measuring instrument that is connected in parallel to target terminals.…

Q: 1. A rechargeable flashlight battery is capable of delivering 105 mA for about 15 h. How much charge…

Q: 5. How many kWh of energy does a 550W toaster use in the morning if it is in operation for a total…

A: This problem is from electrical power generation

Q: 2. An energy source forces a constant current of 2 A for 10 s to flow through a light bulb. If 2.3…

Q: 3,672 C; 4406.4)

Q: 4. Typical interior LED lightbulbs have a power rating of 19 W. These bulbs have a brightness of…

A: Given: Power rating of LED bulb, P=19W Power rating of filament bulb, P=100W Brightness of 1 bulb or…

Q: 4. If you have a 24.0 V motorcycle battery that can make 3500 C of charge, and a 24.0 V car battery…

A: Given, For motorcycle, Voltage rating, Vm=24 V Charge made, Qm=3500 C For Car, Voltage rating,…

Q: An energy source forces a constant current of 6A for 16s to flow through a light bulb. If 5.2KJ is…

A: Given: Current, I=6 A Time, t=16 s Energy loss in form of light and heat, EL=5.2 kJ

Q: 3. The wall charger for an iPhone is 900mA. If you have it plugged into the wall for 2 hours, how…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: An automobile dashboard ammeter shows 10.8 A of current flowing when the headlights are lit. If the…

A: Given data, Voltage from the battery, V = 12 V. Current flowing when headlight are lit, I = 10.8 A.…

Q: A lead acid battery fitted in a truck develops 29V and has an internal resistance of 0.04 ohm.. It…

A: We have an Lead acid battery fitted in a truck witn, Generated Voltage (Eg) = 29 V Internal…

Q: 10.) A 12-V automotive battery is rated at 48 Ah. If a 24-W, 12-V bulb is connected across this…

Q: 2. An energy source forces a constant current of 2 A for 10 s to flow through a light bulb. If 2.3…

Q: 8.12 A 340 Ah battery supplies a constant current load of 17 A for 8 h each day. Compute the…

Q: A 3mA meter movement is to be used as on ohmmeter Rm =150 ohm , with supply voltage =5v .Determine…

A: steps: Full-scale current is given (3mA) the supply voltage is also given Find the equivalent…

Q: Calculate the voltage needed to supply 2 amps through a resistance of 24 ohms

A: Given: Current I = 2A Resistance R = 24 ohms We need to determine the voltage.

Q: How long time taken by a 4 V flash light battery expend energy of 65 J in producing a current flow…

A: Given, Voltage, V= 4 V Current, I= 186 mA Energy, E= 65 J

Q: Required information A rechargeable flashlight battery is capable of delivering 80 mA for about 12…

A: Current flow is given by i = Q/t Now charge stored given by Q = it

Q: Q3: A flashlight battery has a rating of 0.8 ampere-hours (Ah) and a lifetime of 10 hours. (a) How…

A: Battery has rating 0.8 Ampere-Hours Lifetime = 10 Hours So Current Deliver = Rating…

Q: A wire of length 3 m and cross sectional area of 1.7x10-3 m2 has a resistance of 0.03 phn. Find the…

A: Given: Length of wire, Cross section area of wire, Resistance of wire,

Q: Given a battery and a light bulb, show how you would connect these two devices together with wire so…

A: Given a battery and a light bulb, show how you would connect these two devices together with wire so…

Q: Discuss solar energy and it's advantages . How solar energy can be converted into other forms of…

A: For the above given question we need to discuss about the solar energy.

Q: In the circuit shown below, the voltage supplied by the battery is 17 V, R1= 534 Ohms, R2 = 72 Ohms…

Q: What is the device needed to supply a 2 Ton AR, 3 * 300W printers and 5A Medical device and how many…

A: Given : 2 ton AR 3*300 W 5A medical device

Q: 3. Assume you are going to use an analog voltmeter with a full scale value of 5 V to measure the…

Q: 4. A rechargeable flashlight battery is capable of delivering 80 mA for about 12 h. How much charge…

Q: How long can a 1.5 V flashlight battery provide a current of 250 mA to light the bulb if the…

A: Given that, Voltage V= 1.5 VCurrent I =250 mA = 0.250 A Ampere-hour rating =16 Ah We have to find…

Q: For the circuit shown in the diagram below determine the emf of the battery and the potential drop…

A: To find the value of E, first, we need to find the total input current. Find the current in each…

Q: An 11.0-W energy-efficient fluorescent lightbulb is designed to produce the same illumination as a…

A: Given: Power rating of energy-efficient bulb P1=11 W, Power rating of conventional bulb P2=40 W,…

Q: What is the approximate efficiency of an electric motor whose power output is ½ hp and draws a…

A: Motor: It is used to convert the electrical power into the mechanical energy. The electric motor is…

Q: Question 1: The series ohmmeter shown in the figure is made up of a 1.5v battery, a 100 microA meter…

A: we need to determine the value of Im when Rx is zero. and determine the value of Rx for 0.5 FSD,…

Q: 1. A home uses twenty 60W, 2% efficient incandescent bulbs, which are all 'on' anaverage of 4 hours…

A: We are authorized to answer one question at a time. We are answering the first question (1 a,b).…

Q: 6)The Electric resistance of a light bulb is 159 ohms. Determine the value of the current flowing…

Q: B! A shunt type ohmmeter uses a basic meter with a full scale current of 2mA and an internal…

Q: 4) Find the resistance of a lightbulb whose rated 60 W, 220 V. [806.6 Q]

Q: B: A series-type ohmmeter, designed to operate with 6.1-v battery. The meter movement has an…

A: Case ?: When RX1Given 40 % deflection So we can calculate current flow =100x0.4 =40 uAWe can also…

Q: A 6.3-V tube filament (consider it a resistor) requires 300 mA. What resistance is required in…

Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

Question

A 900 mWH / 6V Battery supplies current to a 4V / 25mA white LED, how long it takes the battery to get out of juice? What is the value of the current limiting resistor to be used?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Calculate the value of the multiplier resistance on the 50 V range of a de voltmeter, that uses a 200 micro Ampere meter movement with an internal resistance of 100 ohms.
What is the device needed to supply a 2 Ton AR, 3 * 300W printers and 5A Medical device and how many batteries you need to make the system work for 1 hours ?
For how many hours will a battery with an 32Ah rating theoretically provide a current of 1.28 A? (Answer in engineering notation)
For a 2200 mAh, 12 V rechargeable battery: a. Assume charging current is 220 mA and there is a 40% loss of energy (due to electrical resistance), what is the total charging time if the battery is to be charged from the empty state to the full state? b. Assume the battery is fully charged and connected to a 20 W light bulb, if the loss during discharge is 20%, how long will the battery last before it is completely drained?
A battery with an internal resistance of r and an emf of 10.00 V is connected to a resistor. What is the final current? Is it half, a fourth, or a third of the original current?
Suppose that each headlight of a car uses 3 A and that the driver accidentally left the headlights on. How long will it take for a 12 V battery rated 80 A to be fully discharged?
Energizer battery is capable of delivering 85mA for about 12h. How much charge can it release at that rate? If its terminals voltage is 1.2V, how much energy can the battery deliver?
A 12 Volt lead-acid car battery, engineered for "up to 500 or more charge/discharge cycles," has a rating of 225 Ampere-hours. A one Ampere-hour battery can provide one Amp of current for one hour. It sells for $180. a) If initially fully charged, what is the total electrical energy that the battery can deliver before it needs to be recharged? b) The battery has a mass of 23.1 kg. What total mass of such batteries would be required to deliver the same effective mechanical energy as 16 gallons of gasoline? Assume that the efficiency of an electrically powered car is 2.5 times that of a gasoline-powered car for the conversion to mechanical energy, and that energy content of 1 gallon of gas =1.32×108 Joules. You're going to get a big number - this is why electric cars didn't become widespread until after the development of lithium ion batteries, which can achieve much higher energy densities.
An electric skillet draws 5000 mA at 220 V. Assuming that everything is constant and the voltagedrops by 10%, (a) what will be the current? (b) What will happen to the current if the resistance isreduced by 15%?
A pacemaker uses a battery capable of supplying 0.42 Ah. How many “Coulombs” does this battery supply?
A metal with temperature coefficient of resistance has a value 200, its initial resistance is given by 40 ohm . For an increase in 300 oC to 350 oC, what will be the final resistance value? a ) 0.4 ohmb) 40 ohmc) 400 ohmd) 4 ohme) 40 ohm
A constant current of 2 A is required to charge a car battery for 3 hours. The terminal voltage is 12 V. i. How much charge is transported to the battery as the result of charging? ii. How much energy is expanded in Kilo Joule? iii. If the cost of electricity is 15 cents/kWh, how much is the charging cost?