Posted by **Sheila** on Saturday, October 27, 2007 at 10:30am.

Could someone tell me how to start to solve this? Please

How much current flows in a 1000-ohm resistor when 1.5 volts are impressed across it?

- Physics -
**Quidditch**, Saturday, October 27, 2007 at 10:45am
Use ohm's law:

voltage = current * resistance

arranging for current: current = voltage / resistance

- Physics -
**Sheila**, Saturday, October 27, 2007 at 10:52am
OK but what would the current be 150 watts? volts?

- Physics -
**Sheila**, Saturday, October 27, 2007 at 10:52am
amps?

- Physics -
**Quidditch**, Saturday, October 27, 2007 at 11:08am
amps = volts / ohms

= 1.5/1000 amps

=0.0015 amps

- Physics -
**Quidditch**, Saturday, October 27, 2007 at 11:09am
The unit of currents is amps.

- Physics -
**Sheila**, Saturday, October 27, 2007 at 11:13am
Ok but what is the answer how do i find the resistance? would it be .oo15 amps? this why i get so confused in this subject it all seems to run together.

- Physics -
**Quidditch**, Saturday, October 27, 2007 at 11:25am
Voltage is measured in volts, current is measured in amps, and resistance is measured in ohms. Ohms law says the relationship between these three items is:

V = I * R

where V = voltage in volts

I = current in amps

R = resistance in ohms

The equation can be rearranged to find resistance or current.

I = V / R

R = V / I

The problem gave two values, resistance and voltage. To find current, use the I = V / R equation.

I = V / R

I = (1.5 volts) / ( 1000 ohms)

I = 0.0015 amps

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