EEP Unit 2A & B
A 115/230V rated motor connected to a 230V circuit must have the windings connected in series so that each winding will receive at least 230V.
False
According to the equal resistance method, when all the resistances of the parallel circuit have the same resistance, divide the resistance of one element by the largest resistor in parallel.
False
In a parallel circuit, the total circuit resistance is always greater than the smallest resistance.
False
In a parallel circuit, the voltage drop across each resistance is equal to the sum of the voltage drops of each of the resistors in parallel.
False
No matter how many resistances there are in a series circuit, the sum of the voltages across all of the resistances equals the voltage of the source according to the Resistance Law of Proportion.
False
The power consumed in a series circuit is equal to the power consumed by the largest resistance in the series circuit.
False
There can never be variations in the formulas used or the order in which they're used for series circuits.
False
When power supplies are connected in series, the circuit voltage remains the same as when only one power supply is connected to it, provided that all the polarities are connected properly.
False
A parallel circuit has two or more paths in which current can flow.
True
A series circuit is a circuit in which a specific amount of current leaves the voltage source and flows through every electrical device in a single path before it returns to the voltage source.
True
According to Kirchoff's Current Law, the total current provided by the source to a parallel circuit equals the sum of the currents of all of the branches.
True
If you know the current of the circuit and the resistance of each resistor, the power of each resistor can be determined by the formula P = I2 x R.
True
Kirchoff's Voltage Law states that in a series circuit, the sum of the voltage drops across all of the resistors equals the applied voltage.
True
Resistance opposes the flow of electrons. In a series circuit, the total circuit resistance is equal to the sum of all of the resistances in series.
True
The advantage of the reciprocal method is that the formula can be used for as many resistances as the parallel circuit contains.
True
The current of the circuit can be determined by the formula I = ES/RT.
True
The opposition to current flow results in a voltage drop of the circuit voltage.
True
The total power consumed in a parallel circuit equals the sum of the power of all branches.
True
To calculate the total resistance of the circuit, use the formula: RT = R1 + R2 + R3 +...
True
To determine the resistance of each resistive element in the circuit, use the formula R = E2/VA. E is the rated voltage of the resistance, and VA is the rated power of the resistor.
True
When power supplies are connected in parallel, the voltage remains the same, but the current or ampere-hour capacity is increased.
True
The total resistance of a parallel circuit can be calculated by the _____ method.
equal resistance, product-over-sum, reciprocal, { any of these}
Series circuits are often used for _____ applications.
signal, control, { a and b}
Kirchoff's Current Law states that in a series circuit, the current is _____ through the transformer, the conductors, and the appliance.
the same
The product-over-sum method is used to calculate the resistance of _____ resistance(s) at a time.
two