Answer: No, The energy will remain the same
Explanation: Doubling the mass and leaving the amplitude unchanged won't have any effect on the total energy of the system.
At maximum displacement, E=0.5kA^2
Where E = total energy
K = spring constant
A = Amplitude
From the formula above : Total Energy is independent of mass,. Therefore, total energy won't be affected by Doubling the mass value of the object.
Also when the object is at a displacement 'x' from its equilibrium position.
E = Potential Energy(P.E) + Kinetic Energy(K.E)
P.E = 0.5kx^2
Where x = displacement from equilibrium position
E = Total Energy
K. E= E-0.5kx^2
From the relation above, total energy is independent of its mass and therefore has no effect on the total energy.
C is the answer
D is impossible
A and B are false
Hope this helps!
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Answer:
the inductive reactance of the coil is 1335.35 Ω
Explanation:
Given;
inductance of the coil, L = 250 mH = 0.25 H
effective current through the coil, I = 5 mA
frequency of the coil, f = 850 Hz
The inductive reactance of the coil is calculated as;

Therefore, the inductive reactance of the coil is 1335.35 Ω
Answer:
0.275 nF
Explanation:
First of all, let's calculate the initial charge stored by the capactiro when it is in air. This is given by:

where
is the initial capacitance of the capacitor
is the voltage of the battery
Substituting, we find

When the Teflon slab is inserted between the plates, the capacitance changes according to:

where
is the dielectric constant of Teflon. Therefore, the new charge stored on the capacitor will be:

And so, the change in the charge on the capacitor is:
