1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Andre45 [30]
4 years ago
5

A magnet is passed back and forth through a coil connected to a light bulb. The light bulb lights up. Why?

Physics
2 answers:
Alenkasestr [34]4 years ago
7 0

Answer:

From Faraday's law of Induction: A changing magnetic field induces emf in the coil.

Explanation:

<u>Faraday's law</u> states that when a coil is run through a changing magnetic field or a magnet is passed back and forth through a coil, a<u>n emf is induced which produces electric current in the coil. </u>

Changing magnetic flux induces electromotive force.

e = - \frac{d\phi}{dt} = -\frac{dB A}{dt}

When the magnet is passed back and forth, it causes a changing magnetic flux around the coil. This induces emf and the current flows which lights up the bulb connected to it.

sdas [7]4 years ago
6 0
The moving back and forth of the magnetic causes a changing magnetic field, which  induces an Emf through the coils of the wire and so the bulb ligts up.
You might be interested in
A camera phone called the iPhone X has an image sensor size of 5 mm and a focal length of 4 mm. How long of a selfie-stick must
azamat

Answer:

length of selfie-stick is 1.62 m

Explanation:

Given data

image size h1 = 5 mm = 5 ×10^{-3} m

focal length = 4 mm = 4 ×10^{-3} m

distance h2 = 2.032 m

to find out

How long of a selfie-stick

solution

here we find first magnification

that is M = h1 /h2

M = 5 ×10^{-3} / 2.032

M = 2.46 ×10^{-3}

and we know M = p/q

so p = Mq = 2.46 ×10^{-3} q

so we apply lens formula

1/f = 1/p - 1/q

1/ 4 ×10^{-3} = 1 / 2.46 ×10^{-3}  q - 1/q

q = 1.622 m

so length of selfie-stick is 1.62 m

4 0
4 years ago
The rings of Saturn occupy the region inside Saturn's Roche limit.
Oliga [24]
I suppose this is a true or false question and that sentence is true.
7 0
3 years ago
What term describes an atom’s tendency to hold onto electrons?
avanturin [10]
It's called Electrophily, or electron affinity.
3 0
4 years ago
Read 2 more answers
The distance measured from trough to trough or crest to crest of a wave is called the
ikadub [295]
Its called a wavelength
7 0
3 years ago
Read 2 more answers
For a spring oscillating in simple harmonic motion, at what point will the velocity of
Crazy boy [7]

Answer:

equilibrium position.

Explanation:

In simple harmonic motion , velocity v(t) is given by,

v(t) = -ω A sin(ωt + φ)

where

ω = angular velocity of the corresponding circular motion

A = amplitude

t = time

φ = the initial angle of the corresponding circular motion when the motion begin.

v (t) get maximized when sin value is maximized , i.e. sin \alpha=1

The particle has maximum speed when it passes through the equilibrium position.

6 0
4 years ago
Other questions:
  • The first modern atomic scientist was:
    6·2 answers
  • Why should you exercise caution when taking a personality test? Some online tests may ask for too much personal information. Per
    12·2 answers
  • A comet is in an elliptical orbit around the sun. its closest approach to the sun is a distance of 4.5 1010 m (inside the orbit
    11·1 answer
  • True or False an overtone occurs when two or more sound waves are produced at the same time.
    9·2 answers
  • What is the name of the ionic compound Cs2S
    12·2 answers
  • What causes the very high surface temperature on Venus
    13·1 answer
  • Based on the image below what would an observer on the nighttime side of earth observe?
    12·1 answer
  • 2. Andy is accelerating at 2 m/s?. If he started from a stand still and he has been
    9·1 answer
  • If spring has a spring constant of 500 N/m and is stretched .50 meters,how much energy is stored in the spring ((show work for f
    6·1 answer
  • A brick falls to the ground. if the time for the collision of the brick and the ground is increased by a factor of 4, the force
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!