# Physics

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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 - ,

Use ohm's law:
voltage = current * resistance
arranging for current: current = voltage / resistance

• Physics - ,

OK but what would the current be 150 watts? volts?

• Physics - ,

amps?

• Physics - ,

amps = volts / ohms
= 1.5/1000 amps
=0.0015 amps

• Physics - ,

The unit of currents is amps.

• Physics - ,

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 - ,

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