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oksian1 [2.3K]
3 years ago
10

A 1.5-m length of straight wire experiences a maximum force of 1.6 N when in a uniform magnetic field that is 1.8 T. 1) What cur

rent must be passing through it? (Express your answer to two significant figures.)
Physics
1 answer:
Olenka [21]3 years ago
4 0

Answer:

0.6 A

Explanation:

length, l  = 1.5 m

Maximum force, F = 1.6 N

Magnetic field, B = 1.8 T

Let the current is i.

the force on a current carrying conductor placed in a magnetic field is given by

F = B x i x l x sinθ

Where, θ be the angle between the magnetic field and the length element.

for maximum force, θ = 90°

So,

1.6 = 1.8 x i x 1.5 x 1

i = 0.6 A

Thus, the current in the conductor is 0.6 A.

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Answer: slow revolution and fast rotation

Solar system has 8 planets. 4 inner rocky planets - Mercury, Venus, Earth and Mars and 4 outer gaseous planets - <u>Jupiter, Saturn, Uranus and Neptune.</u>  The outer planets have few common features.

They are gaseous. There  period of revolution is larger than the inner planets which means that they have slow revolution about the Sun. One day on the outer planets is smaller than the inner planets which means they have fast rotation.

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A race car travels 44.3 m/s around a banked (45° with the horizontal) circular (radius = 200 m) track. What is the magnitude of
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The magnitude of the resultant force is given by the centripetal force, since the car is under a circular motion. So, we have:

F_c=ma_c

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F=m\frac{v^2}{r}\\F=80kg\frac{(44.3\frac{m}{s})^2}{200m}\\F=785N*\frac{1kN}{1000N}\\F=0.785kN

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A geologist is studying rock layers in an old river bed, and he finds a fossil of a fish and a horsetail rush in the same rock l
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A geologist is studying rock layers in an old river bed, and he finds a fossil of a fish and a horsetail rush in the same rock layer. According to the law of faunal and floral succession, the geologist can assume that the rock containing the fossils may date back as far as the <span>Devonian period</span>.
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A person pushes a refrigerator across a horizontal floor. The mass of the refrigerator is 110 kg, the coefficient of static fric
Law Incorporation [45]

Answer:

Explanation:

mass of refrigerator, m = 110 kg

coefficient of static friction, μs = 0.85

coefficient of kinetic friction, μk = 0.59

(a) the minimum force required to just start the motion in refrigerator

F = μs x mg

F = 0.85 x 110 x 9.8

F = 916.3 N

(b) The force required to move the refrigerator with constant speed

F' = μk x mg

F' = 0.59 x 110 x 9.8

F' = 636.02 N

(c) Let a be the acceleration.

Net force = Applied force - friction force

F net = 950 - 636.02

F net = 313.98 N

a = F net / mass

a = 313.98 / 110

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What momentum does a 70 kg person running 10m/s (a fast sprint) have ?
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Momentum = (mass) x (speed)

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