Question

What is the increase of current when 15 V is applied to 10000 ohm rheostat, which is adjusted to 1000-ohm value?

Answer 1

13.5 mA or 0.0135 A

Step-by-step explanation:

1.

I=V/R

I=V/RI = 15 V/ 1,000 Ω

I=V/RI = 15 V/ 1,000 Ω

I = 0.015 A or 15 mA (milliamperes)

2.

I=V/R

I = 15 V/ 10,000 Ω

I = 0.0015 A or 1.5 mA (milliamperes)

3.

Therefore, the increase in current when the rheostat is adjusted to 1,000 Ω is:

Al 15 mA - 1.5 mA =

Al = 13.5 mA

So the increase in current is 13.5 mA or 0.0135 A

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