# Physics

Question related to a bicycle dynamo and a wheel.

Why a current flows through the bicycle lamp when the wheel of the bicycle turns?

1. 👍 0
2. 👎 0
3. 👁 71
1. The wheel turns a generator that produces a voltage. The voltahe lights uop the bulb.

Generator-run bike headlights are less commonly used these days. The higher efficiency of LED headlamps with alkaline or lithium ion batteries makes them a better choice; the lamps are smaller, and need no generator. I have not had to replace my LED light batteries for two years. The wheel drag resistance due to the generator also slows down the bike a lot. It is like pedaling with the brakes on.

1. 👍 0
2. 👎 0
posted by drwls

## Similar Questions

1. ### Geometry

The wheel of an adult's bicycle has diameter 26 in. The wheel of a child's bicycle has diameter 18 in. To the nearest inch, how much farther does the larger bicycle wheel travel in one revolution than the smaller bicycle wheel?

asked by Tommy on April 4, 2011
2. ### algebra

Justin races his bicycle for 90M . A wheel of his bicycle turns 45 times as the bicycle travels this distance. What is the diameter of the wheel?

asked by Anonymous on November 12, 2013
3. ### Math

Juan races his bicycle for 196ft a wheel of his bicycle turns 28 times as the bicycle travels this distance. What is the diameter of the wheel?

asked by maria on April 13, 2013
4. ### physics

Omar races his bicycle for 152m. A wheel of his bicycle turns 38times as the bicycle travels this distance. What is the diameter of the wheel?

asked by Morgan on January 7, 2013
5. ### math

The diameter of Sheree's bicycle wheel is 0.705 m. Caculate how many turns the bicycle wheel will make if she rides the bicycle 1 km. So far I've found out that the circumference of the wheel is C=πd =3.14(0.705) =2.2137 m

asked by Bella on December 2, 2016
6. ### math

Wheel’s Bicycle shop advertised a bicycle for 15% off for a savings of \$36. The bicycle did not sell so it was offered at a new 20% discount off the sale price. (a) What did the bicycle sell for regularly? ______________ (b)

asked by Kirk on March 26, 2010
7. ### Math

A wheel on Greg's bicycle is 0.3 m in diameter. Greg races the bicycle for 31 m. How many times does the wheel turn as the bicycle travels this distance?

asked by James on May 14, 2013
8. ### math

Wheel’s Bicycle shop advertised a bicycle for 15% off for a savings of \$36. The bicycle did not sell so it was offered at a new 20% discount off the sale price. (a) What did the bicycle sell for regularly? (b) What is the amount

asked by poo on December 8, 2009
9. ### MATH

Wheel’s Bicycle shop advertised a bicycle for 15% off for a savings of \$36. The bicycle did not sell so it was offered at a new 20% discount off the sale price. a. What did the bicycle sell for regularly? b. What is the amount

asked by brina on November 16, 2009
10. ### math

This is an SAT prep question. Senai customized her bicycle by exchanging the front wheel for a wheel that had one half the diameter of the back wheel. Now Senai rides the bicycle, how many revolution does the front wheel make for

asked by Anonymous on October 31, 2008

More Similar Questions