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
Alika [10]
3 years ago
9

Induced EMF and Current in a Shrinking LoopShrinking Loop. A circular loop of flexible iron wire has an initial circumference of

161cm , but its circumference is decreasing at a constant rate of 13.0cm/s due to a tangential pull on the wire. The loop is in a constant uniform magnetic field of magnitude 1.00T , which is oriented perpendicular to the plane of the loop. Assume that you are facing the loop and that the magnetic field points into the loop.Find the magnitude of the emf EMF induced in the loop after exactly time 8.00s has passed since the circumference of the loop started to decrease.
Physics
1 answer:
vodomira [7]3 years ago
4 0

Answer:

Explanation:

Let c be the circumference and r be the radius

c = 2πr , r = c / 2π , area A = π r² = π (c/2π )²  = (1/4π) x c²

flux (ψ) = BA = 1 X 1/4π X c²

dψ/dt = 1/4π x 2c dc/dt =1/2π x c x dc/dt

at t = 8 s

c = 161 - 13 x 8 = 57 cm , dc/dt = 13 cm/s  

e = dψ/dt = (1 / 2π )x 57 x 13 x 10⁻⁴ = 118 x 10⁻⁴ V.

You might be interested in
a heavy jar sits on top of a 3.4 m shelf with a gravitational potential energy of 180 j. What is the mass of the jar?
sp2606 [1]

Answer:

5.2941176471 kg or 5294.1 grams

Explanation:

g.p.e= mgh

g.p.e/gh=m

180j/10×3.4= m

180/34= m

5.2941 kg= m

6 0
2 years ago
20 N effort is used in the 20 cm long spanner to unscrew a nut, then calculate momentum to unscrew the nut. [ Ans=4 Nm]
irga5000 [103]

Answer:

Refer to the attachment.

7 0
2 years ago
What’s a good hypothesis and and experiment for water?
Lelu [443]

Answer: You could do something like, "how does water react to being mixed with baking soda"...or something along those lines

Explanation:

6 0
3 years ago
an astronaut drops a hammer and an egg while standing on the surface of the moon. which one will the surface first?
elena-s [515]
The two will fall at the same speed and reach the surface at the same time. This is because the two will experience the same gravitational acceleration on the moon. However, on the earth surface the two will land on the surface of the earth at the same time due to air resistance such that the egg will experience a higher air resistance than the hammer. On, the moon, where there is no noticeable atmosphere there is no air resistance on either object and both fall at the same speed. It is also important to note that their mass doesn't affect their speed.
7 0
3 years ago
Read 2 more answers
Who is the father of nuclear physics?​
bija089 [108]

Answer: the father of the nuclear physics is Ernest Rutherford

Explanation:

5 0
3 years ago
Other questions:
  • "5 N, up" is an example of a ___.<br> OA) force<br> OB) mass<br> OC) weight<br> OD) magnitude
    14·1 answer
  • How does the current model of the atom differ from<br> j j thomas model
    8·1 answer
  • Which item is an example of a lever?
    11·2 answers
  • Upper A 16​-foot ladder is leaning against a building. If the bottom of the ladder is sliding along the pavement directly away f
    13·1 answer
  • A proposed electric vehicle makes use of storage batteries as its source of energy. Its mass is 1560 kg and it is powered by 20
    5·1 answer
  • describe what is meant by "a constant change of direction".Identify whether the examples provided show a constant change of dire
    10·1 answer
  • Which statements about the moon’s phases are true? Check all that apply.
    12·2 answers
  • Two water balloons of mass 0.75 kg collide and bounce off of each other without breaking. Before the collision, one water balloo
    6·1 answer
  • Which object has the greatest acceleration
    14·1 answer
  • A 5OKG mass is taken to the moon and the mass determined there, comment on the likely result of the measurement
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!