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inessss [21]
3 years ago
11

A solid, cylindrical wire conductor has radius R = 30 cm. The wire carries a current of 2.0 A which is uniformly distributed ove

r the cross-section of the wire (current density is constant). What is the magnitude of the magnetic field due to the current in the wire at a radial distance of r = 200 cm from the center axis of the wire? HINT: Use Ampere’s law, noting that B is tangential.
Physics
1 answer:
blondinia [14]3 years ago
7 0

Answer:

Explanation:

The point at which magnetic field is to be found lies outside wire so while applying Ampere's law we shall take the whole of current . If B be magnetic field which is circular around conductor.

Applying Ampere's law :-

∫ B dl = μ₀ I      ; I is current passing through ampere's loop

B x 2π x 2.00 = 4 x π x 10⁻⁷ x 2

B = 2 x 10⁻⁷ T.

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Explanation:

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3 years ago
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At what distance r from a point charge is the electric potential due to that point charge 0 v?
galben [10]

Answer:

Infinite Distance

Explanation:

The electric potential due to a point charge can be expressed by the following equation:

V=\frac{kQ}{r}

Here,

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Q is the magnitude of the point charge

r is the distance from the charge

As the value of r increases, the value of V decreases since there is an inverse relation between the two. The value of V can be absolutely 0 when the distance from the charge is infinite i.e. r is infinite. Mathematically, dividing a number by infinity results in zero. Also theoretically speaking, at infinite distance the electric field lines won't approach and hence the electric potential would be zero.

8 0
3 years ago
Consider a basketball player spinning a ball on the tip of a finger. If a player performs 1.99 J of work to set the ball spinnin
sladkih [1.3K]

Answer:

25.8 rad/s

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Circumference of the hollow sphere is given as

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Moment of inertia of basketball is given as

I = \left ( \frac{2}{3} \right )mr^{2}

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3 years ago
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ValentinkaMS [17]

Answer:

This is my answer

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150 × 1,000 = 150,000.

Next substitute the values into the equation:

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force = 150,000 × 180.

force = 27,000,000 N.

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2 years ago
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