Question

How
do I solve both these problems?

1. Charges on the capacitors in three oscillating LC circuits
vary as follows: (1) q = 2 sin(5t), (2)

q =4 sin(3t), (3) q = sin(4t) (with q in coulombs and t in
seconds). Rank the circuits

according to (a) the current amplitude and (b) the period,
greatest first.

2. In an oscillating LC circuit with C = 240 μF, the current
is given by , i= 4sin(450t+0.6)

where t is in seconds, i in amperes, and the phase constant in
radians. (a) How soon after t = 0

will the current reach its maximum value? What are (b) the
inductance L and (c) the total

energy??Thanks

Answer #1

1. In an oscillating LC circuit with C = 77.2
μF, the current is given by i = (2.09) sin(3710t
+ 0.878), where t is in seconds, i in amperes,
and the phase angle in radians. (a) How soon after
t = 0 will the current reach its maximum value? What are
(b) the inductance L and
(c) the total energy?
2. A single-loop circuit consists of a 7.2 Ω resistor, 11.9 H
inductor, and a 3.2 μF capacitor. Initially...

Please explain how so that I can get it
Both problems please and problem 1 only for part (e). Problem2
only part(c).
P1)The expression x = 7.70
cos(2.50πt + π/2) describes the position
of an object as a function of time, with x in centimeters
and t in seconds. What are the following?
(a) frequency
1.25Hz
(b) period
0.8 s
(c) amplitude
7.70 cm
(d) initial phase of the object's motion
1.57 rad
(e) position of the particle at t...

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