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Physics
17.03.2022 03:58
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What determines the paths of electrons around a nucleus? a. the fundamental quantum

What determines the paths of electrons around a nucleus? a. the fundamental quantum of energy
b. interaction with other atoms
c. magnetism
d the number of neutrons in the nucleus
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bjbass899
bjbass899
4,8(89 marks)

The equation of current is I=0.86 cos \left (120 t + \frac{\pi}{2} \right )

Explanation:

Resistance, R = 12 ohm

Inductance, L = 0.06 H

E (t) = 12 cos (120 t)

Compare with the standard equation,

E=E_{0}cos (2\pi ft)

2\pi ft = 120 t \\\\\\w = 2\pi f = 120 rad/s

So, the inductive reactance is

XL = w L = 120 x 0.06 = 7.2 ohm

The impedance of the circuit is

Z =\sqrt{12^2+7.2^2}\\\\Z = 14 ohm

The current leads  by 90degree so the equation of current is

I=\frac{Eo}{Z} cos \left (120 t + \frac{\pi}{2} \right )\\\\I=\frac{12}{14} cos \left (120 t + \frac{\pi}{2} \right )\\\\I=0.86 cos \left (120 t + \frac{\pi}{2} \right )

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