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
vodomira [7]
3 years ago
15

A copper wire loop has a circular shape, with a radius a (see below). The loop is put perpendicularly to the uniform magnetic fi

eld, which changes with time according to the next function (α and β are both constant and positive): B = α + βt. Is there an electromotive force induced in the loop? If yes, calculate its value and find its direction. If not, explain why there is no electromotive force induced in the loop.
Physics
1 answer:
Luda [366]3 years ago
5 0

Answer:

 fem = -A β

Explanation:

Faraday's law gives the induced electromotive source (emf)

           fem = - \ \frac{d \phi_B }{dt}

the magnetic flux is

           \phi_B = B. A = B A cos θ

the bold are vectros.  In this case the normal to the ring is parallel to the magnetic field so the angle is zero  cos 0 = 1, also the area of the ring is constant

             fem = -A  \frac{dB}{dt}

we carry out the derivative of the function B = α + β t

            fem = -A β

so we see that there is an electromotive force in the ring.

You might be interested in
When you stretch a spring 13 cm past its natural length, it exerts a force of 21
zloy xaker [14]

Answer:

A. 1.6 N/cm

Explanation:

spring constant = 21/13 = 1.6 N/cm

8 0
3 years ago
What are the characteristics of scientific thinking and investigating
nignag [31]

Answer:

Explained

Explanation:

following are characteristics of scientific thinking and investigating

1. Critical thinking

2. A curious mind

3. Possessing a Skeptical attitude

4. Problem solving attitude

5.A obervant of empirical evidences

A scientific theory is a unifying and self-consistent explanation of fundamental natural processes or phenomena that is totally constructed of corroborated hypotheses

7 0
3 years ago
An energy resource that can be replaced in a reasonable short period of time is call an
Semenov [28]
A Renewable resource
6 0
3 years ago
Read 2 more answers
The Red Sea is widening at a rate of 1.25 centimeters per year. How many years will it take to widen another 812.5 centimeters?
Pani-rosa [81]
E 812 Jak’s now fmfdkc
5 0
3 years ago
Define torque qualitatively and quantitatively.
abruzzese [7]
When you use a wrench to tighten or loosen a nut on a bolt, you are applying torque. It is measured in units of force times distance.  A force of F newtons pulling on a handle of L meters in length would supply a torque of F L newton-meters. More technically, torque is the vector cross product of force times perpendicular distance from the object, F x r = F r sin @
4 0
3 years ago
Read 2 more answers
Other questions:
  • hello:) I don’t really understand this graph. I thought uniform acceleration means the velocity is constant so it’s a constant g
    9·1 answer
  • You blow across the open mouth of a test tube and produce the fundamental standing wave of the air column inside the test tube i
    11·2 answers
  • A plane flies from base camp to lake a, a distance of 290 km at a direction of 20.0° north of east. after dropping off supplies,
    15·1 answer
  • Water from a fire hose is directed horizontally against a wall at a rate of 50.0 kg/s and aspeed of 42.0 m/s. Calculate the forc
    12·2 answers
  • 4 This question has several parts that must be completed sequentially. If you skip a part of the question, you will not receive
    11·1 answer
  • a ball dropped from rest falls freely intil it hits the ground with the speed of 20 m/s . the tine furing which the ball is in f
    7·1 answer
  • An electric generator has an 18-cmcm-diameter, 120-turn coil that rotates at 60 HzHz in a uniform magnetic field that is perpend
    14·1 answer
  • What is the electric potential difference of 5cm from a point charge of -2.0µc
    5·1 answer
  • Practicing soccer skills works most muscles groups.<br><br> True Or False
    7·2 answers
  • A 0.03 kg baby sea turtle moves across the sand toward the ocean at 0.3 m/s. What is her kinetic energy in Joules?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!