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11-06-2014
Physics

Answered

I don't understand how to get 50000 ohms, please can someone help? I would have just left my answer at 25,000 ohms!

I dont understand how to get 50000 ohms please can someone help I would have just left my answer at 25000 ohms class=

I dont understand how to get 50000 ohms please can someone help I would have just left my answer at 25000 ohms class=

Answer :

11-06-2014

I think this is shown in the fine print on the second sheet . . .

The question starts out by saying that the scale uses two 3V cells in series.
That makes the total battery voltage 6 volts.

0.12 milliamperes = 0.00012 Amperes.

Resistance = (voltage) / (current in Amperes).

Resistance = 6 / 0.00012 = 50,000 Ω

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