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3 years ago

6

Circle the letter of the sentence that tells how Bohr' model of the atom differed from Rutherford's model A. Bohr's model focuse

d on the nucleus B. Bohr's model focused on the protons C. Bohr's model focused on the neutrons D. Bohr's model focused on the electrons

1 answer:

photoshop1234 [79]3 years ago

4 0

Answer:

A. Bohr's model focused on the nucleus

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Answer: - 452.088joule

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What is the radius of a tightly wound solenoid of circular cross-section that has 180turns if a change in its internal magnetic

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Answer:

Radius of cross section, r = 0.24 m

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It is given that,

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Current, I = 6 A

Resistance of the solenoid, R = 17 ohms

We need to find the radius of the solenoid (r). We know that emf is given by :

$E=N\dfrac{d\phi}{dt}$

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Since, E = IR

$IR=NA\dfrac{dB}{dt}$

$A=\dfrac{IR}{N.\dfrac{dB}{dt}}$

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$A=0.188\ m^2$

or

$A=0.19\ m^2$

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$r=\sqrt{\dfrac{A}{\pi}}$

$r=\sqrt{\dfrac{0.19}{\pi}}$

r = 0.24 m

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3 years ago