Chapter 6 DC Series Circuits
More power is produced when a load's resistance is high or it's applied voltage is low
false, resistance is low , voltage is high
When a DMM set to measure current inserted in series at every junction of the components in a series circuit, it reads a different current value at each junction
false, the same current value
voltage multiplier is a circuit made of resistors connected in series to produce a desired voltage drop across the resistors
false, voltage divider
A____ is a low-resistance conducting connection between electrical and electronic circuits, equipment, and the earth
ground
Not all sources of electrical potential have internal resistance
false, All
A series circuit has two current paths
false, one
The total power in a circuit of six loads are connected in series and each load produces 20 W is ___W
120
The voltage drop across an 8 ohms resistor in a circuit that has a total current of 8 A is _____V
16
The actual voltage of a 208 V circuit with a load resistance of 25 ohms and load current of 8 A is ____V
200
The minimum allowable voltage at the load of a 208 V circuit with a load resistance of 25 ohms and load current of 8 A is ____V
201.76
The voltage drop across a 2 ohms resistor in a circuit that has a total current of 12 A is ____V
24
The total power in a circuit if four loads are connected in series and each load produces 60 W is _____W
240
The national code suggest that conductors be sized so that they do not reduce the voltage at the load by more than____% of the source voltage
3%
The supply voltage in a series circuit containing a total resistance of 3 ohms and total current of 12 A is ____V
36
The supply voltage in a series circuit containing a total resistance of 5 ohms and total current of 15 A is ____V
75
In a complex circuit, the source voltage is designated as ______
V-t
In a series circuit, the sum of the voltage increases is equal to the source votlage
false
Whenever the load resistance is matched to the source, less than maximum power is delivered to the load
false
To find total resistance in a series circuit, the values of the resistors in the circuit are_____
added
____ is the flow of electrons through an electrical circuit
current
Voltage______ is the amount of voltage used by a device when current passes through it
drop
A ground is a unlimited source and acceptor of _____ in a circuit
electrons
Current is the flow of ______ through an electrical circuit
electrons
____ is produced any time electrons flow through a wire that has resistance
heat
A power rating is listed in watts for appliances and in _____ for motors
horsepower
Maximum _____ transfer between a source and load depends on the load resistance matching the source resistance
power
____ produced is measured in watts
power
Current has the same value at any point in a(n) _____ circuit
series
A complex circuit includes two or more resistive loads
true
A listed power rating is given in watts (W) for most appliances or in horspower (HP) for motors
true
Certain types of electronic systems require both a positive and negative source of voltage for proper operations
true
Efficiency of a circuit can be determined by dividing the power at the load by the total power output
true
Electrons have bodies that can be counted
true
Heat is produced when electrons flow through a wire that has resistance
true
Resistors are available with a variety of power ratings
true
The lower a load's resistance, the more power produced in a series circuit
true
Voltage drop is proportional to the resistance value of the resistors in a series circuit
true
Ohm's law can be used to calculate the ____ drop across any resistor
voltage
A_____ is a circuit that is constructed by connecting resistors in series to produce a desired voltage drop across the resistors
voltage divider
___is the amount of voltage consumed by component as current passes through it
voltage drop
When selecting a heating element for an application, the size of the heating element is typically stated in _____ and is based on the application
watts