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Deffense [45]
3 years ago
9

Strong magnetic fields created by high currents can result in:910 A. Arc flash B. Arc blast C. Large mechanical stresses that ma

y cause conductors to move D. Shock
Physics
1 answer:
yawa3891 [41]3 years ago
5 0

Answer:

B. Arc blast

Explanation:

Arc blast are as a result of rapid injection of electrical energy into an arc. These shock waves and arc blast pressure wave at low level can lead to damage of eardrums at lower levels and cardiac arrest at high levels.

Strong magnetic fields created by high currents (> 100 kA) can result to equipment destruction. These arc blast hazards are mostly found in high-energy power circuits and large capacitor banks.

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The current in the wires of a circuit is 60.0 milliAmps. If the voltage impressed across the ends of the circuit were doubled (w
Pavel [41]

Answer:

120 mA

Explanation:

The relationship between voltage, current and resistance in a circuit is given by Ohm's law

I=\frac{V}{R}

where

I is the current

V is the voltage

R is the resistance

In this problem, we have an initial current of

I = 60 mA

Then the voltage is doubled:

V' = 2 V

while the resistance is kept the same:

R' = R

So the new current is

I' = \frac{V'}{R'}=\frac{2V}{R}=2\frac{V}{R}=2 I

so, the current has doubled. Since I = 60 mA, the new current is

I' = 2(60 mA)=120 mA

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the answer is the second one

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A. is a neutral substance.

Only neutral substances (like pure water) can have a pH of 7.

5 0
3 years ago
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assuming that voltage remains constant, what happpens to the current in a wire as its diameter decreases?
Nataly_w [17]
A larger diameter wire has lower resistance. A lower resistance wire produces less heat for a given current flowing through it.
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