Answer:
1.25 turns
Explanation:
From Transformer equation,
Ns/Np = Vs/Vp............................ Equation 1
Where Ns = Secondary turns, Np = Primary turns, Vs = secondary Voltage, Vp = Primary Voltage.
make Ns the subject of the equation 1
Ns = NpVs/Vp.......................... Equation 2
Given: Np = 100 turns, Vp = 120 V, Vs = 9600 V
Substitute into equation 2
Ns = 100(120)/9600
Ns = 1.25 turns.
Hence the are 1.25 turns in the secondary coil = 1.25 turns
A simple machine can make work easier by reduce the amount of energy needed to perform a task, therefore, B. it magnifies the potential energy so that the kinetic energy is greater is the correct answer:)
Each piece of magnet has only two poles, one north and one south. So if you break a bar magnet into two halves, the piece initially consisting the north pole at the edge automatically creates the south pole at the break point and the part consisting south pole creates North pole at the edge. So each piece has 2 poles.
Answer:
28500
Explanation:
Force equation - F = m * a
F = 950 * 30
F = 28500
