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3 years ago

A long, East-West-oriented power cable carrying an

Physics

1 answer:

Alla [95]3 years ago

8 0

Answer:

200A

Explanation:

Given that

the distance between earth surface and power cable d = 8m

when the current is flowing through cable , the magnitude flux density at the surface is 15μT

when the current flow throught is zero the magnitude flux density at the surface is 20μT

The change in flux density due to the current flowing in the power cable is

B = 20μT - 15μT

B =5μT -----(1)

The expression of magnitude flux density produced by the current carrying cable is

$B=\frac{\mu_0I}{2\pi d}$ -----(2)

Substitute the value of flux density

B from eqn 1 and eqn 2

$\frac{\mu_0I}{2\pi d}=5\times 10^-^6\\\\\frac{(4\pi \times 10^-^7)I}{2 \pi (8)} =5\times 10^-^6\\\\I=200A$

Therefore, the magnitude of current I is 200A

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3 years ago

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The Chevy Corvette Z06 is claimed to accelerate from a standing start to 60 miles per hour in 3 seconds. Estimate its accelerati

Vika [28.1K]

Answer:

The acceleration of Chevy Corvette is $8.94\ m/s^2$ .

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4 years ago

A boy is listening to the radio. The loudspeaker plays a musical note by vibrating 256 rimes esch second. How many times does th

Svet_ta [14]

Answer:

f_tympanum = 256 Hz.

Explanation:

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Consequently if the incident vibration is f = 256 hz, the eardrum resonates at the same frequency

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Answer:

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