A. If an 8 k resistor is connected to a potential difference of 15 V, how much c

Question

A. If an 8 k resistor is connected to a potential difference of 15 V, how much current will flow through the circuit?

I= [Answer] A

B. If a 25 resistor and a 100 resistor are connected in series, what is the equivalent resistance?

R(EQ)= [Answer]

C. If a 25 resistor and a 100 resistor are connected in parallel, what is the equivalent resistance?

R(EQ)= [Answer]

D. Which set-up with a 25 resistor and 100 resistor will draw more current from a source for a given potential difference, a series set-up or a parallel set-up?

A.Series set-up

B.Parallel set-up

Explanation / Answer

A) Use ohm's law, V = I*R

==> I = V/R

= 15/8000

= 1.875*10^-3 A

B) Req = 25 + 100

= 125 ohms

C) 1/Req = 1/25 + 1/100

Req = 25*100/(25+100)

= 20 ohms

D) B.Parallel set-up

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