In a transformer, energy is carried from the primary coil to the secondary coil by magnetic field in the iron core.
To find the answer, we have to know more about the transformer.
<h3>
How transformer works?</h3>
- An item utilized in the transfer of electric energy is a transformer.
- AC current is used for transmission.
- It is frequently used to modify the supply voltage between circuits without altering the AC frequency.
- The fundamentals of mutual and electromagnetic induction govern how the transformer operates.
- Magnetic field through the primary coil changes when primary coil current varies. the iron core of the secondary coil likewise has a magnetic field.
- EMF is therefore generated in the secondary coil.
Thus, we can conclude that, in a transformer, energy is carried from the primary coil to the secondary coil by magnetic field in the iron core.
Learn more about the transformer here:
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Answer:
The superimposition is possible in a way such that at least 10 positions will have same digit.
Explanation:
The solution to this question is possible by using the pigeonhole principle. <em>which is given as </em><u> Suppose that n+1 (or more) objects are put into n boxes. Then some box contains at least two objects.</u>
- Suppose one disk is smaller than the other, but both the disks have equal number of sectors and they both have 10 0s and 10 1s on the sectors.
- Now fix the larger disk and superimpose the smaller disk on that.
- There are 20 positions of the smaller disk such that each sector of the smaller disk is contained in the larger disk.
- As the larger disk has 20 sectors with 10 0s and 10 1s, thus each sector of the smaller disk will match digits in exactly 10 out of the possible positions.
- The total number of digits matches are given as 10 times the number of sectors on the smaller disk and equals 200.
- So the average is given as 200/20 =10
<em>Thus Two circular disks each have 10 0s and 10th 1s spaced equally around their edges in different orders are superimposed on top of each other so that at least 10 positions have the same digit.</em>
Answer:
4 seconds
Explanation:
bullet flies 200m/s. thus 800m/200m=4sec
Answer:
8.75 m/s^2
Explanation:
initial speed, u = 300 m/s
final speed, v = 400 m/s
distance, h = 4 km = 4000 m
Let a be the acceleration of the plane.
Use third equation of motion
a = 8.75 m/s^2
Thus, the acceleration of the plane is 8.75 m/s^2.
Answer:
The speed of the car at the end of the 2nd second = 8.0 m/s
Explanation:
The equations of motion will be used to solve this problem.
A car starts from rest,
u = initial velocity of the car = 0 m/s
Accelerates at a constant rate in a straight line,
a = constant acceleration of the car = ?
In the first second the car moves a distance of 2.0 meters,
t = 1.0 s
x = distance covered = 2.0 m
x = ut + (1/2)at²
2 = 0 + (1/2)(a)(1²)
a = 4.0 m/s²
How fast will the car be moving at the end of the second second
Now,
a = 4.0 m/s²
u = initial velocity of the car at 0 seconds = 0 m/s
v = final velocity of the car at the end of the 2nd second = ?
t = 2.0 s
v = u + at
v = 0 + (4×2)
v = 8.0 m/s