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
victus00 [196]
2 years ago
11

A magnetic B field of strength 0.4 T is perpendicular to a loop with an area of 1 m2. If the area of the loop is reduced to zero

in 0.7 s, then what is the magnitude of the induced emf voltage?
Physics
1 answer:
Norma-Jean [14]2 years ago
3 0

Answer:

The magnitude of the induced e.m.f is 571 mV

Explanation:

Given;

magnetic field strength, B = 0.4T

area of the loop, A = 1m²

time = 0.7s

Since the angle of inclination of the magnetic field, then the direction of the induced e.m.f, θ = 0

According to faraday's law; the induced emf is directly proportional to the rate of change of flux.

Thus, magnitude of the induced e.m.f is given as

E.M.F = \frac{\delta \phi}{\delta t} \\\\\phi = BAcos \theta =  BAcos0 = BA\\\\E.M.F = \frac{0.4 X1}{0.7} = 0.571 V

You might be interested in
Time-outs are ineffective because
maria [59]
I think the correct answer would be the child quietly sits until the timer goes off. It is ineffective because the child would be used to this process and would come to a time where he will not get something from it.Also, it would make a child feel isolated and alone which would affect hi self-esteem in a long run.
8 0
3 years ago
Read 2 more answers
Who discovered the laws of planter motion ?
MatroZZZ [7]

Answer:

Johannes Kepler

Explanation:

whose analysis of the observations of the 16th-century

5 0
3 years ago
Read 2 more answers
A bullet of mass 10g is fired from a gun. The bullet takes 0.003s to move through its barrel and leaves it with a velocity of 30
dsp73

Answer:

1,000 N

Explanation:

v=300 \text{ms}^{-1} ;u=0,t=000.3\text{s},m=0.01\text{kg}

Force exerted by the bullet on the rifle = \frac{m(v-u)}{\text{time}}

F = 1000N

Contextual Way:

Newton's second law of motion.

F=m a

Now to solve based on the current info, we shall assume that:-

The force exerted on the bullet was uniform across the entire duration of bullet leaving the barrel, i.e., 0.003 seconds {Not necessarily true for real life applications as the force will not be uniform from the point of hammer impact till the point of leaving the barrel. In reality you will get a Force profile across that entire duration}

We are not distinguishing between bullet and cartridge. {What you shall hold in your hand and load in a revolver is a cartridge containing the gunpowder, bullet etc. The bullet is the projectile at the mouth of the cartridge that actually leaves the barrel and hit the target. So when you are weighing in real life, you are not weighing the bullet, rather the cartridge as a whole}

Getting back to the question

Impulse equation for the bullet

∫F∗dt=∫m∗dv

Average impulse delivered= Change in momentum of the bullet

Assuming average force delivery

Favg∗∫dt=m∗∫dv

Favg∗0.003=0.010∗300

Favg=300∗10/3

Favg=1000N

7 0
1 year ago
A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to th
boyakko [2]

Answer:

8.76762 m

Explanation:

T = Time period = 5.94 seconds

g = Acceleration due to gravity = 9.81 m/s²

L = Length of pendulum = Height of tower

Time period is given by

T=2\pi \sqrt{\dfrac{L}{g}}\\\Rightarrow T^2=4\pi^2\dfrac{L}{g}\\\Rightarrow L=\dfrac{T^2g}{4\pi^2}\\\Rightarrow L=\dfrac{5.94^2\times 9.81}{4\pi^2}\\\Rightarrow L=8.76762\ m

The height of the tower is 8.76762 m

8 0
3 years ago
Identifying Advantages of Parallel Circuits
melisa1 [442]

Answer: If one bulb goes out the other bulbs stay lit.

If there is a break in one branch of the circuit, current can still flow through the other branches.

Explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • The attractive electrostatic force between the point charges 6.14×10−6 c and q has a magnitude of 0.845 n when the separation be
    11·1 answer
  • The magnetic field due to the loop always opposes the external magnetic field.(b) The flux due to the loop always has the opposi
    15·1 answer
  • 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
  • A soup company wants to manufacture a can in the shape of a right circular cylinder that will hold 500 cm^3 of liquid. The mater
    7·1 answer
  • a tiger leaps horizontally from a 5.7m high rock with a speed of 4.1m/s. How far from the base of the rock will she land
    13·1 answer
  • Name at least two clouds types in each level, with their characteristics:
    7·2 answers
  • What kind of wave is each of the following? The sound of one whale calling another whale under water. A pulse sent down a stretc
    7·1 answer
  • What force (in N) must be exerted on the master cylinder of a hydraulic lift to support the weight of a 2100 kg car (a large car
    14·1 answer
  • If you wake up in the morning, go to school, go to the grocery store, and then return to the same place where you woke up, what
    8·1 answer
  • Which arrow represents the substance’s change of state?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!