The statement given about a training pyramid is a) True
<h3>Meaning of a Training pyramid</h3>
A training pyramid can be defined with a pyramid in view where there are different steps from bottom to top.
A training pyramid is a training process that starts with easy and simple training tasks to difficult and hard task.
In a pyramid system you get to build step by step.
In conclusion, The statement given about a training pyramid is a) True
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Use the first kinematic formula
Vf = Vi + at
10 = 0 + 1(t)
10 = t
10 seconds
Answer:
0.712 mH
Explanation:
The emf produced by the coil = 2.6 V
Current is changes from -29 mA to 33 mA so change in current di =33-(-29)=62 mA
The time duration that is dt=17 ms
The emf is given by ![e=L\frac{di}{dt}](https://tex.z-dn.net/?f=e%3DL%5Cfrac%7Bdi%7D%7Bdt%7D)
![2.6=L\frac{62}{17\times 10^{-3}}](https://tex.z-dn.net/?f=2.6%3DL%5Cfrac%7B62%7D%7B17%5Ctimes%2010%5E%7B-3%7D%7D)
![L=0.712\times 10^{-3}H=0.712mH](https://tex.z-dn.net/?f=L%3D0.712%5Ctimes%2010%5E%7B-3%7DH%3D0.712mH)
So the value of inductance will be 0.712 mH
In an electric motor, periodically changing the direction of current in the electromagnet can cause the axle to spin because of the reversing of magnetic field direction.
Explanation
An electric motor consists of a long rod termed as axle which is connected to the electric current.
When the current will be flowing through the axle, a magnetic field will be generated around the axle due to magnetic induction.
The axle is positioned between two strong electromagnets. So when the magnetic field is generated around the axle, depending upon the direction of flow of current, the magnetic field can get attracted or repelled by the electromagnets.
Thus the change in the direction of current flow will lead to reverse in the direction of magnetic field generated around the axle causing it to spin.