Answer:
C
Explanation:
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The total energy produced by the generator is 3.45 kJ. Of this energy, 2.23 kJ are lost because friction and electrical resistance, so this amount of energy is converted into thermal energy. This means that the rest of the energy is available as electric energy, and it is equal to:
Answer:
There is no magnetic field.
Explanation:
Since th capacitor is charged and isolated, magnetic field doesn't exist.
For magnetic field to exist, there must be flow of charge.
Thew energy stored in a capacitor of capacitance and voltage between the plates is
.
Substituting numerical value
Answer:
Position of x at t = 1.44s is - 0.0817 m
Explanation:
For the harmonic motion of the spring, the displacement is given by
x = A cos wt
A is the amplitude of displacement = 0.14 m
t = time = 1.44 s
w = angular frequency and for a spring's motion, it is given by
w = √(k/m)
k = spring's stiffness = 6.5 N/m
m = 2.8 kg
w = √(6.5/2.8) = 1.524 rad/s
x = 0.14 cos (1.524 × 1.44) = 0.14 cos 2.194 = 0.14 × - 0.5836 = - 0.0817 m