It matters how and where you put your batteries – it could be the difference between a fire or a working light bulb.

Stacking the batteries will make the light bulb extremely bright – putting them near each other but not stacked will still light the bulb.

Think of resistance as a straw – if you try to suck on a tiny straw, it will be very hard because the straw is not made for that.

Resistance definition: “opposes the current flow in a circuit”

Light bulbs provide their one resistance – that’s where it gets the heat from. However, it can be too much and it can explode.

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Ohm’s law:

Voltage = V (Measured in Vols)

Current = I (Measured in Amperes)

Resistance = R (Measured in Ohms)

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Ohm’s triangle:

V on top

I on bottom left

R on bottom right

Two plus signs in the middle on each side

One multiplication symbol in between R and I

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1-5 mA: Mild discomfort

5-10 mA: Pain

10-20 mA: Muscle contractions

20+ mA: Paralysis to deathly

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How much current will travel through your body using a 9 volt battery? .09

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Mr. Calvert will put a battery on his tounge, which my guess says would cause him 5-10 mA (pain).

Voltage of battery: 9 V

Resitance of tounge: 7 kilhooms, (better than dry skin)

Current: ?

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I was wrong.

The current was 1.71 kilhooms.

He experienced mild discomfort.

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