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ycow [4]
2 years ago
13

What is current of 12 ohm? help me pleasee​

Physics
1 answer:
notsponge [240]2 years ago
4 0

Answer:

the current of 12 ohm is 2Amps

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A source at rest emits light of wavelength 500 nm. When it is moving at 0.90c toward an observer, the observer detects light of
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Answer:

The observer detects light of wavelength is 115 nm.

(b) is correct option

Explanation:

Given that,

Wavelength of source = 500 nm

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Using Doppler effect

\lambda_{o}=\sqrt{\dfrac{1-\beta}{1+\beta}}\lambda_{s}

Where, \beta=\dfrac{c}{v}

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4 years ago
When the current in a toroidal solenoid is changing at a rate of 0.0275 a/s, the magnitude of the induced emf is 12.4 mv. when t
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Answer:

41 turns

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Change in flux is given by

\dfrac{d\phi}{dt}=L\dfrac{dI}{dt}\\\Rightarrow 12.4\times 10^{-3}=L0.0275\\\Rightarrow L=\dfrac{2.4\times 10^{-3}}{0.0275}\\\Rightarrow L=0.08727\ H

Flux through each turn is given by

\dfrac{\phi}{N}=L\dfrac{I}{N}\\\Rightarrow 0.00285=0.08727\times \dfrac{1.34}{N}\\\Rightarrow N=\dfrac{0.08727\times 1.34}{0.00285}\\\Rightarrow N=41.03221\ turns

The number of turns is 41

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3 years ago
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I think milligram is the correct answer.

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The angle of reflection is the angle that the reflected ray makes with a line drawn perpendicular to the reflecting surface.

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