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3 years ago

Is nickel coin magnetic?

Physics

2 answers:

katen-ka-za [31]3 years ago

8 0

Answer:

Yes

Explanation:

Hey there!

Nickles are always magnetic. So it is the same for a nickle coin.

~I hope I helped you! :)~

Eddi Din [679]3 years ago

3 0

Yes ! The Coin is Magnetic. Try and experiment yourself , make sure a adult is around . Since 1992, coins have been made with steel, which is magnetic. (Pre-1992 coins are made out of bronze, which will not attract.) The dangling shows us how magnetic force travels through some metals, in this case coins (coins become magnetised when they attach) but gets weaker with each one

What the Video for more help : https://terpconnect.umd.edu/~wbreslyn/magnets/is-nickel-magnetic.html

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3 years ago

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Flura [38]

Answer:

a. 0.33 Amp

b. 2.4 Volt

c. 0

d. 2.45 Amp

e. Infinite

f. Series is safer

Explanation:

Series Connection of Resistors

When two or more resistors are connected in series, the current through each one of them is the same, and the voltage divides depending on the particular value of each resistance. If all the resistances are equal, then the voltage is equally divided.

a. The string of 50 bulbs is connected to a 120 VAC outlet and consumes 40 W. The power of a circuit is given by

$P=V.I$

Solving for I

$\displaystyle I=\frac{P}{V}=\frac{40}{120}=0.33\ Amp$

Since all the bulbs are connected in series the current is the same for all of them.

b. The voltage is equally divided, so each bulb has 120/50= 2.4 V

c. If one of the bulbs burns out and its resistance becomes infinite, then the series circuit is open and no current flows through it, neither through the rest of the bulbs. The typical case of the whole string going out.

d. If one of the bulbs short circuits, the resistance of that bulb is zero and the voltage is distributed by the 49 remaining bulbs. Thus the new current is

$\displaystyle I=\frac{V}{R}=\frac{120}{49}=2.45\ A$

e. If the bulbs were connected in parallel, all of them would have the same voltage, and the total current will be equally divided among them. In that case, a short circuit in one of the bulbs will cause a parallel short, theoretically producing an infinite current and making the short circuit protection blow up.

f. The condition described above makes the strings be made of series-connected bulbs which is safer than the parallel circuit. If a single bulb shorts, the entire string goes out in a series connection, but the breaker would trigger disconnection of the house circuit if it's a parallel connection. That is why we must deal with unusable strings instead of burning cables.

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3 years ago

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harkovskaia [24]

F=mv^2/R
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3 years ago

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Answer

given,

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3 years ago

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Answer:

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But 1 hour = 3600 seconds;

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The total charge that the battery can provide is 612000 C.

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3 years ago