Aheating pad has several strips of heater wire connected in parallel. consider eight of the wires, each with 4ω resistances, connected to a 12v power source. given this scenario answer the following questions a. what is the total resistances of eight wires(they are in groups of two)? b. what is the total current?

The total resistance and total current in the circuit is required.

The total resistance is

The total current is 6 A.

Voltage = 12 V

Number of resistances = 8

Resistance of each resistor =

2 groups of 4 wires are connected in parallel and they are connected to each other in series

Total resistance is

Total current is

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The  question is going along fine, and then suddenly "groups of two" get thrown in.  What that means is not clear at all.

Here's a solution assuming that 8 heater wires are all in parallel:

-- The resistance of each wire is 4 ohms.

-- If eight resistors, each 4 ohms, are in parallel, the total resistance is 0.5 ohm.

-- Current = (voltage)/(resistance)

Current = (12 volts) / (0.5 ohm)

Current = 24 Amperes.

Power dissipated by the heater = (voltage) x (current)

Power = (12 volts) x (24 Amps) = 288 watts, a nice toasty heating pad.

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