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
alukav5142 [94]
3 years ago
5

. A circular wire loop 40 cm in diameter has 100 Ohm resistance and lies in a horizontal plane. A uniform magnetic field points

vertically downward, and in 25 ms it increases from 5 mT to 55 mT. Find the magnetic flux through the loop at (a) the beginning and (b) the end of 25 ms period. (c) What is the loop current during this time
Physics
1 answer:
sergeinik [125]3 years ago
7 0

Answer:

(a) 6.283 Wb (b) 69.11 Wb (c) I = 0.628 A

Explanation:

Given that,

The diameter of the loop, d = 40 cm

Radius, r = 20 cm

Initial magnetic field, B = 5 mT

Final magnetic field, B' = 55 mT

Initial magnetic flux,

\phi_i=BA\\\\=5\times 10^{-3}\times \pi \times 20^2\\\\=6.283\ Wb

Final magnetic flux,

\phi_f=B'A\\\\=55\times 10^{-3}\times \pi \times 20^2\\\\=69.11\ Wb

Due to change in magnetic field an emf will be generated in the loop. It is given by :

\epsilon=-\dfrac{d\phi}{dt}\\\\=\phi_f-\phi_i\\\\=69.11-6.283\\\\=62.827\ V

Let I be the current in the loop. We can find it using Ohm's law such that,

\epsilon=IR\\\\I=\dfrac{\epsilon}{R}\\\\I=\dfrac{62.827}{100}\\\\=0.628\ A

Hence, this is the required solution.

You might be interested in
If a player has more mass they will also have more_____
prohojiy [21]

Weight? On certain planets.

7 0
4 years ago
PLEASE HELP!!!!
Goryan [66]

Answer:

The braking distance would be about nine times as long (assuming that acceleration during braking stays the same.)

Explanation:

Let u denote the initial velocity of the vehicle (20\; \text{mph} or 60\; \text{mph}) and let v denote the velocity of the vehicle after braking (0\; \text{mph}). Let x denote the braking distance.

Assume that the acceleration during braking are both constantly a in both scenarios. The SUVAT equations would apply. In particular:

\begin{aligned} x &= \frac{v^{2} - u^{2}}{2\, a}\end{aligned}.

Since v = 0<em> </em>(the vehicle has completely stopped), the equation becomes x = (-u^{2}) / (2\, a).

Assuming that a (braking acceleration) stays the same, the braking distance x would be proportional to u^{2}, the square of the initial velocity.

Hence, increasing the initial speed from 20\; \text{mph} to 60\; \text{mph} would increase the braking distance by a factor of 3^{2} = 9.

7 0
1 year ago
Read 2 more answers
An object with a mass of 9 kg weighs 14.4 N on the Moon. What is the
erma4kov [3.2K]

Answer:

1.6 m/s²

Explanation:

Weight equals mass times acceleration due to gravity.

F = mg

14.4 N = (9 kg) g

g = 1.6 m/s²

7 0
4 years ago
Read 2 more answers
How much work is needed to stop a 1,110 kg car that is moving straight down the
schepotkina [342]

Answer:

382.74 kJ.

Explanation:

The work that must be done to stop an 1100 kg car travelling at 59  km/h is  - 382.74 kJ.

3 0
3 years ago
All living and nonliving material is composed of<br> (1) air (3) water<br> (2) elements (4) soil
Elan Coil [88]
Elements is the answer to this question
5 0
3 years ago
Read 2 more answers
Other questions:
  • Sam's bike tire contains 15 units of air particles and has a volume of 160mL. Under these conditions the pressure reads 13 psi.
    13·1 answer
  • What types of compounds are involved in solutions that are used to grow crystals? In your own words please
    5·1 answer
  • As the distance between two masses increases, the gravitational force of attraction between them
    9·1 answer
  • What causes the curved movement of air or water?
    5·1 answer
  • 2. A 2.5 meter-long wave travels at 1 m/s towards a fixed boundary. After 2 seconds, how does the wave appear?
    10·1 answer
  • A cable capable of pulling 4,500 N snapped while trying to drag a 20,000 N compressor across the street. What is the coefficient
    6·1 answer
  • Which two statements describe reasons that semiconductors must be
    12·2 answers
  • Question 2
    14·1 answer
  • If a cannonball is fired horizontally it will not go in a straight line why?
    12·1 answer
  • Need help with problems 5,7,85 is not out7 is not up 8 is not 0N
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!