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AlladinOne [14]
4 years ago
14

An electric circuit can have no current when a switch is .

Physics
2 answers:
Korolek [52]4 years ago
7 0

Answer: It's "Open"

Explanation:

Stells [14]4 years ago
3 0
An electric current can have no current when the switch is OPEN
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The quantity of charge q (in coulombs) that has passed through a surface of area 2.00 cm2 varies with time
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Explanation:

We have,

Surface area, A=2\ cm^2=0.0002\ m^2

The current varies wrt time t as :

q(t) = 4t^3 + 5t + 6

(a) At t = 2 seconds, electrical charge is given by :

q(t) = 4t^3 + 5t + 6\\\\q(2) = 4(2)^3 + 5(2) + 6\\\\q=48\ C

(b) Current is given by :

I=\dfrac{dq}{dt}\\\\I=\dfrac{d(4t^3 + 5t + 6)}{dt}\\\\I=12t^2+5

Instantaneous current at t = 1 s is,

I=12(1)^2+5=17\ A

(c) Current is, I=12t^2+5

Current density is given by electric current per unit area.

J=\dfrac{I}{A}\\\\J=\dfrac{(12t^2+5)}{0.0002}\\\\J=5000(12t^2+5)\ A/m^2

Therefore, it is the required explanation.

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4 years ago
A 675 kg car moving at 15.7 m/s hits from behind another car moving at 9.6 m/s in the same direction. If the second car has a ma
AveGali [126]

Answer:

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Explanation:

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5 0
3 years ago
Hydrogen is in Group 1A of the periodic table, known as the alkali metals, although it obviously isn't a metal. What is the reas
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Answer:A

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5 0
3 years ago
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Someone please answer this, ill give you brainliest and your getting 100 points.
dsp73

Answer:

Option B is correct

Explanation:

  • A is denoted to lithosphere followed by B -asthenosphere .

Which is covered by lava of E(Mantal section)

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The _________ of a line is defined as its rise divided by its run.
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Answer:

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