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UNO [17]
3 years ago
13

A single loop circuit is constructed by connecting an ideal capacitor to an ideal inductor (using ideal wires) and a switch. The

switch is initially open and the charge stored by the capacitor is Q0. The switch is closed and the circuit is observed for some time. The switch is reopened at an instant when the charge stored by the capacitor is again Q0 and an iron core is inserted into the inductor (which has the affect of increasing the inductance. The switch is then closed and the circuit is observed. Which of the following parameters are larger for the second observation (the circuit after the iron core was placed in the inductor)?
a) capacitance
b) time constant
c) period of oscillation
d) frequency of oscillation
Physics
1 answer:
olga55 [171]3 years ago
7 0
I think the answer is time constant
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3 0
3 years ago
A piano tuner stretches a steel piano wire with a tension of 1070 N . The wire is 0.400 m long and has a mass of 4.00 g . A. Wha
pychu [463]

A. 409 Hz

The fundamental frequency of a string is given by:

f_1=\frac{1}{2L}\sqrt{\frac{T}{m/L}}

where

L is the length of the wire

T is the tension in the wire

m is the mass of the wire

For the piano wire in this problem,

L = 0.400 m

T = 1070 N

m = 4.00 g = 0.004 kg

So the fundamental frequency is

f_1=\frac{1}{2(0.400)}\sqrt{\frac{1070}{(0.004)/(0.400)}}=409 Hz

B. 24

For this part, we need to analyze the different harmonics of the piano wire. The nth-harmonic of a string is given by

f_n = nf_1

where f_1 is the fundamental frequency.

Here in this case

f_1 = 409 Hz

A person is capable to hear frequencies up to

f = 1.00 \cdot 10^4 Hz

So the highest harmonics that can be heard by a human can be found as follows:

f=nf_1\\n= \frac{f}{f_1}=\frac{1.00\cdot 10^4}{409}=24.5 \sim 24

8 0
4 years ago
A picture hangs evenly from two wires of equal length. The wires each make an angle of 45 degrees with the ceiling. If the mass
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Answer:

41.578N

Explanation:

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3 years ago
Prečo je omnoho ľahšie udržať sa na hladine vody v mori ako v rieke
Vika [28.1K]

Answer:

please write in english language so that we can help you

6 0
3 years ago
Can anyone help if u know it pls!!
LuckyWell [14K]

Answer:

(1)

H² = B² × L²

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H² = 84.64 × 27.04

H² = 2288.6656

H = √ 2288.6656

H = 47.84

4 0
3 years ago
Read 2 more answers
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