Homework Help: Physics

Posted by susane on Thursday, March 15, 2007 at 3:55pm.

Thanks for any help :)

Four 20 ohm resistors are connected in parallel and the combination is connected to a 20V emf device. The current is:
A) 0.25A
B) 1.0 A
C) 4.0 A
D) 5.0 A
E) 100 E

Parallel circuits:
I know that the voltage is 20V and the Resistance is 20 V. So, I divided I=V/R
I= (20/20)=1 The current for a parallel circuit is found by I= I + I+ I+I
The current is 1 so therefore I total would be 4 or C.

Four 20 ohm resistors are connected in series and the combination is connected to a 20V emf device. The potential difference across any one of the resistors is:
A) 1 V
B) 4 V
C) 5 V
D) 20V
E) 80 V

So there are four resistors that are 20 ohms. Their connected to a 20 V device. The question wants to known volts. Its says for a parallel circuit. I just dividied 20V/4 and got 5V.Is that ok to think of it that way?

Thank you

correct on the first. However, if the second circuit is parallel, each resistor has 20V across it.

No one has answered this question yet.

Answer this Question

Related Questions

physics - Four 20 ohm resistors are connected in series and the combination is ...
physics (please help) - Four 20 ohm resistors are connected in parallel and the ...
physics (please check) - Four 20-ohm resistors are connected in series and the ...
Physics - 1)Four resistors of 10.0 each are connected in parallel. A combination...
physics - the effective resistacce of two resistors connected in series is 100 ...
physics - two unknown resistors a and b are connected together. when they are ...
physics - a 40.0 ohm resistor and a 90.0 ohm resistor are connected in parallel...
Physics repost - Four resistors of 10.0 each are connected in parallel. A ...
science - Three different resistors: 10 ohm, 20 ohm, and 20 ohm are connected in...
science - three 10 ohm resistors are connected in parallel what is the ...

For Further Reading

First Name:
School Subject:
Answer: