Two appliances a lamp with a resistance of 15 and a curling iron with a resistance of 20 are connected in parallel to a 120v source through a 2 resistor in series how much current passes through the circuit when both appliances are on?

11.3 A

Explanation:

First of all, we need to find the equivalent resistance of the two appliances in parallel, which is given by:

Then we know that these two appliances are connected in series to another resistor of

So the total resistance of the circuit is

And since we know the voltage of the source,

V = 120 V

We can now calculate the current in the circuit by using Ohm's law:

i think the answer is a, hope this : )

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form