Question

describe the relationships for up to three resistors, among power current voltage and resistance for series and parallel circuits?

Answer #1

What are the relationships between the currents through the
resistors and the voltage drops across resistors when they are
connected…
a. …in series?
b. …in parallel?

Series/Parallel Circuits: When unequal resistors are connected
in series across an ideal battery,
the same power is dissipated in each one.
the potential difference across each is the same.
the equivalent resistance of the circuit is equal to the
average of all the resistances.
the current flowing in each is the same.
the equivalent resistance of the circuit is less than that of
the smallest resistor.

Three resistors are connected in series across a battery. The
value of each resistance and its maximum power rating are as
follows: 5.4Ω and 28.3 W, 33.8Ω and 9.33 W, and 15.1Ω and 12.6 W.
(a) What is the greatest voltage that the battery can have without
one of the resistors burning up? (b) How much power does the
battery deliver to the circuit in (a)?

Three resistors are connected in series across a battery. The
value of each resistance and its maximum power rating are as
follows: 4.2Ω and 22.5 W, 25.6Ω and 13.1 W, and 21.7Ω and 10.4 W.
(a) What is the greatest voltage that the
battery can have without one of the resistors burning up?
(b) How much power does the battery deliver to
the circuit in (a)?

Three resistors are connected in series across a battery. The
value of each resistance and its maximum power rating are as
follows: 5.3Ω and 23.4 W, 41.6Ω and 11.2 W, and 12.7Ω and 10.9 W.
(a) What is the greatest voltage that the battery can have without
one of the resistors burning up? (b) How much power does the
battery deliver to the circuit in (a)?

As more resistors are added in series to a constant voltage
source, the power supplied by the source? What if instead more
resistors are added in parallel to a constant voltage source?
a. increases; decreases
b. increases; does not change
c. decreases; increases

. A series-parallel combination of resistors is created from 4
resistors, there is a 45 ohm resistor followed in series by a
parallel combination of a 30 Ohm resistor on one branch, and a 10
Ohm and a 15 Ohm resistors in series on the other branch. The whole
combination is attached to a 12 V battery. a) find the net
resistance of the resistors to the current from the battery. b)
What is the current in the 45 Ohm...

1. Using what you know about resistance, current, and Ohm's Law,
hypothesize about how parallel resistors would affect current flow.
What would you expect the effect of the resistance of two equal
resistors in parallel to be on the current flow, compared to the
resistance of one alone?
-What are the different advantages of a) the series vs. b) the
parallel circuits? The resistors could be replaced with lightbulbs
or any other household objects including switches and fuses. Can
you...

Explain current and circuits with resistors connected in
series and in parallel. Also give examples.

Explain current and circuits with resistors connected in series
and in parallel. Also give examples. (Please NOT by hand)

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