Question

An ignition coil to start a car can produce as much as 25 kV. How does...

An ignition coil to start a car can produce as much as 25 kV. How does it get this voltage from 12 volts? Once you think you have the answer, ask yourself how it uses a battery to do this since a battery is a DC source.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

This setup is same as that of the step up transformer. The ignition coil is made of two coils of wire one with less number of turns or loops and the other with a large number of loops.Now by using a small inverter with the battery the DC current is first converted to AC current.

When current passes through the first coil a magnetic field is produced by the first coil. This magnetic field is then passed within the second coil with sufficiently high number of loops.

With AC current there is changing magnetic field because of the changing current . Hence the flux in the second loop also changes. As we know EMF is produced with changing flux and with hugh number of loops, The EMF will also be high as the EMF is dirrectly proportional to the number of loops.

So, again as I stated above the DC is first converted to AC.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Does capacitance depend on how much voltage is applied across it? if you disconnect the battery...
Does capacitance depend on how much voltage is applied across it? if you disconnect the battery and measure the voltage across the capacitor plates. How do you compare this with the voltage when the battery was connected?
1. How much does it cost to operate a 120-W lightbulb for 25 min if the...
1. How much does it cost to operate a 120-W lightbulb for 25 min if the cost of electricity is $0.086 per kilowatt-hour? 2. A 75-V battery supplies 3.9 kW of power. How much current does the battery produce? Express your answer to two significant figures and include the appropriate units. 3. A battery connected to a 140-? resistor dissipates 2.5 W of power. If the circuit contains only the battery and the resistor, what is the voltage of the...
a) A bag is carried in from your car. How much work do you do on...
a) A bag is carried in from your car. How much work do you do on the bag? The distance from the car to the house is 10 m and the ground is flat. b) A person is in a boat in the middle of a lake without a motor or oars. You have a box of balls in the boat. How do you get to shore, assuming the lake is frictionless? (Think conservation of momentum) c) The same forces...
Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows...
Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a Quick Start battery is normally distributed, with a mean of 45.4 months and a standard deviation of 7.7 months. (a) If Quick Start guarantees a full refund on any battery that fails within the 36-month period after purchase, what percentage of its batteries will the company expect to replace? (Round your answer to two decimal places.) % (b)...
Post a response (2-4 sentences each). You can start a discussion by pointing out additional reasons...
Post a response (2-4 sentences each). You can start a discussion by pointing out additional reasons why you think this source is or is not credible. You can also suggest ways in which the site could be improved (is there information or are there sources they could have added? Are there different messages that would be more appropriate?). Write at least 1 response-post for each of the THREE “Part 1” posts you read (you will need at least 3 responses...
Professor wants to buy a new car, and of course it will be a sensible sedan,...
Professor wants to buy a new car, and of course it will be a sensible sedan, because, he is a professor. He is also concerned about how much carbon and air pollution he will produce from his car. He is considering two cars: -A Honda Civic sedan. The car will cost $20,500 and it will get on average 30 miles to the gallon. Assume that the 5-year repair and maintenance costs will be $3200. -A Toyota Prius sedan. The car...
A recent study evaluated how addicted teenagers become to nicotine once they start smoking. The response...
A recent study evaluated how addicted teenagers become to nicotine once they start smoking. The response variable was the number of yes answers on a questionnaire called the Hooked on Nicotine Checklist​ (HONC). Of teenagers who had tried​ tobacco, the mean HONC score was 2.9 ​(s=4.3​) for the 150 females and 2.3 (s=3.6​) for the 181 males. Complete parts a through c below. a. Find the standard error comparing the sample means. Interpret. What does the standard error​ indicate? A.The...
1. Given the table below, about how much force does the rocket engine exert on the...
1. Given the table below, about how much force does the rocket engine exert on the 5.0 kg payload? Distance traveled with rocket engine firing (m) Payload final velocity (m/s) 500 250 490 250 1020 360 505 254 2.Look at the figure below. You compress a spring by x, and then release it. Next you compress the spring by 3x. How much more work did you do the second time than the first? 3. A crane is lifting construction materials...
How does the support worker encourage Stanley to take an active role in his own support...
How does the support worker encourage Stanley to take an active role in his own support needs? Give one example of this. Given what you know about him, give an example of how strengths- based approach could be used to support Stanley in one of his future goals of catching public transport. What work role boundaries have been crossed by the support workers, and what could be the consequences for working outside of their limitations? Why is so much work...
Read the article ‘How stocks test young investors’. When deciding how much to invest in stocks,...
Read the article ‘How stocks test young investors’. When deciding how much to invest in stocks, Mr Kitces says, your first consideration should be how comfortable you are with risk to begin with. This is what’s known as your ‘risk tolerance. ’ The problem: Investors — particularly young ones — are notoriously bad at predicting how much money they are willing to lose. Compounding the problem, young investors, due to their lack of experience in the markets and overall financial...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT