Answer:
I = 2.19A, anticlockwise direction.
Explanation:
Given r = 33cm = 0.33m, N = 12, ΔB = 7.5 - 1.5 = 6.0T, Δt = 3s, R = 3.75Ω
By Faraday's law of electromagnetic induction when there is a change in flux in a coil or loop, an emf is induced in the coil or loop which is proportional to the time rate of change of the magnetic flux through the loop.
The emf E is related to the flux by the formula
E = – NdФ/dt
Where N = number of turns in the coil, Ф = magnetic flux through the loop = BA, B = magnetic field strength, A = Area
In this problem the strength of the magnetic field changes. As a result the flux too changes and an emf is induced in the coil.
So
ΔФ = ΔB×A = ΔB×πr² = 6×π×0.33² = 2.05Wb
E = -NΔФ/Δt = 12×2.05/3 = 8.2V
I = E/R = 8.2/ 3.75 = 2.19A
The direction of the current can be found by pointing the thumb of your right hand in the direction of the magnetic field and curling the remaining fingers around this direction. The direction of the curl of these fingers give the direction of current which in this case is anticlockwise.
A nonactive person should go swimming because swimming is a great exercise and when you are swimming the bones are more oiled up and they are more lubed and moveable. There are so many benefits that swimming help, for example, swimming helps keep your heart rate up but takes some of the impact stress off your body, it builds endurance, muscle strength and cardiovascular fitness, it helps you maintain a healthy weight, and healthy heart and lungs, it also helps tones muscles and builds strength, and lastly it provides an all-over body workout, as nearly all of your muscles are used during swimming. Swimming is a way to relax peacefully, alleviate stress, improving coordination balanced and posture, it improves flexibility. Before going to swim make sure you warm up and stretch your muscles and joints, have plenty of fluid on hand and drink regularly. Swimming has become one of the most popular sports in Australia and the nation is surrounded by water and swimming which is one of the huge passions that people have created. Its one way to have fun, keep fit, stay healthy and make friends. Swimming is also a healthy activity that you can continue for a lifetime and it has a low-impact that had many physical and mental health benefits. Swimming has helped a lot of special need kids, it's also an exercise that doctors recommend a lot to all their patients if they got an injury or when they have to do some kind of special exercise
Swim Test:
1. Jump into the pool, submerge fully, return to the surface and immediately begin swimming without pushing off the wall.
2. Swim in a horizontal position on top of the water using a forward crawl or breaststroke. The swimmer's arms must achieve full extension on every stroke, and he or she must maintain one or both of the strokes for the full 25-yard swim. Pausing is only allowed when the swimmer is rotating or turning to breathe.
3. Exit the pool without assistance using either the wall or pool ladder.
4. do 4 laps in 3 minutes
The atomic nucleus is made up of a certain amount of protons(+ charge) and neutrons (0 charge). It is the center of an atom. The electrons (- charge) orbit the nucleus.
Hope this answers it.
Brady
Explanation:
Metals get charged by induction ,the charges are transferred from the electroscope causing earthing: Charges on the electroscope induce opposite charges on the conductor.
I want brainliest plz!!!
Answer:
<em>Life science is alternatively known as biology, and physical science is subdivided into branches: physics, chemistry, Earth science, and astronomy.</em>
