Final Study Guide 001292
A voltage that is positive with respect to ground is a(n) _____ voltage. Correct!
Above ground
What is the smallest part of an element that still retains the properties of that element
An atom
A point that is used as a common connection for other parts of a circuit not actually driven into the ground is called a _____ ground. Correct!
Chasis
To symbolize a ground point made by physically driving an object such as a rod or pipe into the ground, a(n) _____ ground symbol is used.
Earth
In a series circuit, the sum of the voltage drops is _______ the applied voltage
Equal to
In a parallel circuit, the current is the same at any point in the circuit.
False
The amount of current flowing through each resistor is directly proportional to its resistance.
False
A voltmeter has a very ______ resistance connected in series with the meter movement
High
By observing the direction of current flow through the circuit, voltage _____ can be determined.
Polarity
The time base of the oscilloscope is calibrated in ________ per division
Seconds
In a parallel circuit, the total current flow is equal to the _____ of the currents through all the branches.
Sum
A kilowatt-kiloVARs recording meter will record true power or reactive power
True
The grounding prong of a plug should never be cut off or bypassed
True
What force pushes the electrons through a resistance in a circuit
Voltage
A series circuit has two resistors that dissipate 10 W and 15 W, respectively. What is the total power dissipation of the circuit?
25W
Aprox how many horsepower is an electrical device that is listed as 3000 watts
4
The sum of the currents in a parallel circuit must _____________ the total current.
Be equal to
An _______ ammeter operates on more than one range by connecting the meter movement to different shunts
Multirange
A series circuit has ____ paths for current flow
One
What force is demonstrated in objects with like charges
Repulsion
Assume a total current of 2 amperes flows in a circuit with three resistors. R1 has a value of 1400 ohms, R2 has a value of 200 ohms, and R3 has a value of 100 ohms, producing a total resistance of 80 ohms for the circuit. What is the amount of the current flow through resistor R1?
0.114
Assume a total current of 2 amperes flows in a circuit with three resistors. R1 has a value of 1000 ohms, R2 has a value of 240 ohms, and R3 has a value of 300 ohms, producing a total resistance of 80 ohms for the circuit. What is the amount of the current flow through resistor R3?
0.53
The greeks were the first to discover electricity about
2500 years ago
A parallel circuit is composed of two 60 Ω resistors. What is the total resistance?
30ohms
A two-resistor series circuit has an applied voltage of 100 V. The voltage across one of the resistors is 40 V. What is the voltage across the other resistor?
60v
In parallel circuits the voltage drop across any branch is the same as the ______
Applied Voltage
What force is demonstrated in objects with unlike charges
Attraction
Alternating current is
Bidirectional
A combination circuit is a circuit that contains
Both series and parallel components
What should be used to solve the unknown values in a combinaiton circuit
Both series circuit and parallel circuit rules
The d'Arsonval meter movement is operated by applying ________ current to the coil
DC
What type of current flows in only one direction
Direct Current
A lesser amount of current will flow through a low-value resistor, and a greater amount of current will flow through a high-value resistor.
False
To solve unknown values in a parallel circuit use sereies circuit rules for those sections that are connected in a parallel circuit
False
Voltage flows through an electric circuit like water flows through a pipe
False
In voltage divider circuits, what is often used to provide a common reference point to produce voltages?
Ground
One coulomb per second is equal to
One ampere
An ammeter is connected in __________ with the load to permit the load to limit current flow
Series
What can be found whena combination circuit has been reduced to a simple parallel circuit
Total resistance
In a combination circuit, to identify series and parallel elements, you should ______
Trace the current paths
Direct current is
Unidirectional
What is another term for electromotic force EMF
Voltage
Matter can exist in only two states
false
The unit of resistance to current flow is the
ohm
The amount of electrical power being used in a circuit is measured in
watts
Assume a total current of 2 amperes flows in a circuit with three resistors. R1 has a value of 1400 ohms, R2 has a value of 200 ohms, and R3 has a value of 100 ohms, producing a total resistance of 80 ohms for the circuit. What is the amount of the current flow through resistor R2?
0.800
Assume a total current of 2 amperes flows in a circuit with three resistors. R1 has a value of 1400 ohms, R2 has a value of 200 ohms, and R3 has a value of 100 ohms, producing a total resistance of 80 ohms for the circuit. What is the amount of the current flow through resistor R3?
1.600
A parallel circuit is composed of a 10 Ω and a 22 Ω resistor. It has a voltage of 60 V. What is the current in the 10 Ω resistor?
6A
What is the applied voltage in a series cicuit with two resistors of 25v and 60v
85v
A junction point of current paths is often called
A node
A method for finding total resistance of parallel resistors is _____.
All of the above
What type of current reveres its direction of flow at regular intervals
Alternating
A test meter that uses a scale and pointer to indicate values is an
Analog meter
In series circuits the ______ voltage is equal to the sum of the voltage drops across all the resistors
Applied
A complete circuit is often referred to as an ______ circuit
Closed
In a series circuit, the total current flow is equal to the sum of the currents through all of the circuit branches.
False
The low impedance voltage tester is most suitable for use in ________
High power circuits
Imagine a water system with a holding tank, pump, and return lines. What would happen to the resistance to flow if a return path is added to the system?
It lessens
The voltage section and the time base are the two main sections of what measuring instrument
Oscilloscope
Circuits that have more than one path for current flow are _____ circuits.
Parallel
In ________ circuits the total resistance is equal to the reciprocal of the sum of the reciprocals of the branch resistances
Parallel
One rule for ______ circuits states that the voltage is the same across each branch of the circuit
Parallel
What produces a graph of metered values during a certain length of time
Recording meter
Solving combination circuits includes a step in which you ______
Reduce the circuit to a simper circuit
What type of circuit is generally occurs when the conductors leading from and back to the power source become connected
Short
A combination circuit can be reduced or simplified to a simple parallel circuit.
True
A combination circuit contains both series and parallel elements.
True
A node is a junction point where the current splits when reached
True
Matter has mass and occupies space
True
The amount of power (W) used by each resistor can be found by using Ohm's law.
True
To calculate the amount of current flow through a resistor using the current divider formula, you need to know the values of the resistor, total resistance for the circuit, and total current of amperes flow. Correct!
True
Tracing the current path in a combination circuit will identify the series and parallel elements.
True
Assume a total current of 2 amperes flows in a circuit with three resistors. R1 has a value of 1000 ohms, R2 has a value of 240 ohms, and R3 has a value of 300 ohms, producing a total resistance of 80 ohms for the circuit. What is the amount of the current flow through resistor R2?
0.67
What law states that the force of electrostatic attraction or repulsion is directly proportional to the product of the two charges and inversely proportional to the square of the distance between them
Coulombs Law
An increase in _____, not resistance, results in an increase of load.
Current
In series circuits, the ______ is the same at any point in the circuit
Current
The term "load" refers to the amount of _____ in a circuit branch.
Current
Parallel circuits are also called _____.
Current Dividers
The rule known as ___________ states that in parallel circuits the total current flow in the circuit is equal to the sum of the currents through all the branches.
Current adds
Assume a current of 1 ampere enters a parallel circuit at Point A. This 1 ampere of current will ________________between Resistors R1 and R2 and then recombine at Point B.
Divide
