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Setler79 [48]
3 years ago
7

Which of the following would decrease the magnetic field around a wire?

Physics
1 answer:
shusha [124]3 years ago
4 0
The correct answer is
<span>A. decreasing the current

In fact, the magnetic field produced by a current carrying wire is given by
</span>B(r) =  \frac{\mu_0 I}{2 \pi r}
<span>where
</span>\mu_0 is the vacuum permeability
<span>I is the current in the wire
r is the distance from the wire at which the field is calculated

We see from the formula that the intensity of the field, B, is directly proportional to the current I, so if the current decreases, the magnetic field strength B decreases as well.</span>
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7 0
3 years ago
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Options are:<br>a)4Cn<br>b)5Cn<br>c)6 Cn<br>d)3 Cn<br>​
nasty-shy [4]

Answer:

Option B. 5 nC

Explanation:

From the question given above, the following data were obtained:

Capicitance (C) = 100 pF

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Next, we shall convert 100 pF to Farad (F). This can be obtained as follow:

1 pF = 1×10¯¹² F

Therefore,

100 pF = 100 pF × 1×10¯¹² F / 1 pF

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Quantity of charge (Q) =?

Q = CV

Q = 1×10¯¹⁰ × 50

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Therefore,

5×10¯⁹ C = 5×10¯⁹ C × 1×10⁹ nC / 1 C

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2 years ago
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Answer:

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Explanation:

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