Posted by **Anonymous** on Tuesday, May 31, 2011 at 3:36pm.

A 2400 watt appliance operating at 10 amps has most nearly_____ ohms resistance.

A) 24

B) 0.5

C) 5

D) 240

E) need more info

I tried to find a formula to use, but i don't know which one to use. Thank you.

- PHY (NEED ANSWER SOON PLS) -
**MathMate**, Tuesday, May 31, 2011 at 4:01pm
Power = Vi = V²/r = i²r

In the given problem, you have been given the current i=10 amps, Power = 2400 watts.

The resistance can be calculated from one of the above formulas.

- PHY (NEED ANSWER SOON PLS) -
**Anonymous**, Tuesday, May 31, 2011 at 4:43pm
so can i use P=i(^2)r

r=P/i(^2)=24

so the answer is A, correct?

- PHY (NEED ANSWER SOON PLS) -
**MathMate**, Tuesday, May 31, 2011 at 5:05pm
Right!

## Answer This Question

## Related Questions

- math - a. The power of an electric appliance is given by the formula P=I^2R, ...
- Math - Amperes (abbreviated amp) measure the strength of electric current. An ...
- Physics - The typical resistance of the tungsten filament of a 60 watt ...
- physics - Calculate the resistance of a 900 watt toaster operating at 120 volts...
- PHY [non-calc] - Resistors R1= 10ohms, R2= 40 ohms and R3= 70 ohms are connected...
- science - according to ohms law what is the resistance of a lightbulb if that ...
- physics - If the filliament resistance in an automobile headlamp is 3 ohms, how ...
- Physics - Calculate the resistance of a 900 watt toaster operating at 120 volts...
- math: and i really need help - You plug a microwave into a 20-ampere (amp) ...
- Physics - Would someone please check my answers? thanks During a lie detector ...

More Related Questions