Which of the following statements is not true of vibrations?

A solenoidal coil with 25 turns of wire is wound tightly around another coil with 300 turns. The inner solenoid is 25.0 cm long

joja [24]

Answer:

$5.65487\times 10^{-8}\ Wb$

$1.17\times 10^{-5}\ H$

-0.020475 V

Explanation:

$\mu_0$ = Vacuum permeability = $4\pi \times 10^{-7}\ H/m$

$N_1$ = Number of turns of coil = 25

$N_2$ = Number of turns of coil 2 = 300

$\frac{di_2}{dt}$ = Rate of current increased = $1.75\times 10^3\ A/s$

d = Diameter = 2 cm

r = Radius = $\frac{d}{2}=\frac{2}{2}=1\ cm$

A = Area = $\pi r^2$

Magnetic field in the solenoid is given by

$B=\mu_0\frac{N_2}{l}I\\\Rightarrow B=4\pi\times 10^{-7}\frac{300}{0.25}\times 0.12\\\Rightarrow B=0.00018\ T$

Magnetic flux is given by

$\phi=BA\\\Rightarrow \phi=0.00018\times \pi\times 0.01^2\\\Rightarrow \phi=5.65487\times 10^{-8}\ Wb$

The average magnetic flux through each turn of the inner solenoid is $5.65487\times 10^{-8}\ Wb$

Mutual inductance is given by

$L=\frac{N_1\phi}{i_1}\\\Rightarrow L=\frac{25\times 5.65487\times 10^{-8}}{0.12}\\\Rightarrow L=1.17\times 10^{-5}\ H$

The mutual inductance of the two solenoids is $1.17\times 10^{-5}\ H$

Induced emf is given by

$V=-L\frac{di_2}{dt}\\\Rightarrow V=-1.17\times 10^{-5}\times 1.75\times 10^3\\\Rightarrow V=-0.020475\ V$

The emf induced in the outer solenoid by the changing current in the inner solenoid is -0.020475 V

5 0

3 years ago

Lamp power with 120 W what is the current through the lamp when it is connected to a 12 V battery ?

SVETLANKA909090 [29]

Answer:

current = 10A

Explanation:

recall the formula, Power = current * voltage

120 W = current * 12V

current (A) = 120 W / 12V

current = 10A

3 0

3 years ago

One object has twice as much mass as another object. The first object also has twice as much a velocity. b gravitational acceler

Gemiola [76]

It would be c. As it can’t accelerate faster thus not having a faster velocity so it’s inertia

6 0

3 years ago

What are the cues for a forehand stroke

MaRussiya [10]

Answer:

huh

Explanation:

8 0

3 years ago

Astrology is considered which of the following types of science?

Murljashka [212]

The answer is A. Astrology is pseudoscience because it is not scientifically backed.

5 0

4 years ago

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