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Exam 6: Parallel Circuits

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Question 1

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When using the product over sum method of determining the total resistance of a parallel circuit, you would ____.

A) multiply the total of R(1) times R(2) by the total of R(1) plus R(2)
B) multiply the total of R(1) plus (R2) by the total of R(1) times R(2)
C) divide the total of R(1) times R(2) by the total of R(1) plus R(2)
D) divide the total of R(1) plus R(2) by the total of R(1) times R(2)

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Question 2

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A parallel circuit has three resistors rated at 20 ohms, 40 ohms, and 40 ohms. The total resistance of this circuit is ____________________ ohms.

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Question 3

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Three resistors, with values of 10 ohms, 20 ohms, and 30 ohms, are connected in parallel and the circuit has a voltage of 120 volts with an amperage of 2.5 amps. The total current of the 20-ohm branch is ____ amps.

The total ____________________ flow in a parallel circuit is equal to the sum of the currents through all of the branches of the circuit.

In a ____________________ circuit, all the lights on a circuit would have to be on in order for any one light to operate.

____ is the amount of power a circuit is supplying to an electrical device.

The reciprocal of any number is that number divided ____.

In a ____________________ circuit, if one light were to burn out, all the lights on the entire circuit would go out.

In parallel circuits, the voltage across each branch of the circuit is ____.

In parallel circuits, when all resistors are of equal value the total resistance is equal to the value of one individual resistor ____.

The amount of current leaving the source ____.

According to Ohm's law, an increase of resistance must cause a proportional decrease of ____.

A ____ circuit is the conductors that supply power to electrical equipment from the last overcurrent protective device (fuse or circuit breaker) .

____________________ circuits are circuits that have more than one path for current flow.

If four resistors, each with a value of 100 ohms, are connected in parallel, the total resistance of the circuit is ____ ohms.

The total resistance of a ____________________ circuit is the reciprocal of the sum of the reciprocals of the individual branches.

____________________ circuits are probably the type of circuit with which most people are familiar, such as when working with lights and receptacles in homes and office buildings.

The total amount of power in a ____ circuit is equal to the sum of the power used by all the parts.

In a parallel circuit,the amount of current flowing through each resistor is inversely proportional to its ____.

The total resistance of a ____ circuit is always less than the resistance of the lowest value resistor in the circuit.