Electric Vehicle Technician Course Module 3 Direct Circuit Currents
Module 3 Direct Circuit Currents
- For the circuit shown in Figure 3-25, determine the voltage drop across the resistor R3
- Which rule/law states that the algebraic sum of all the voltage drops in a circuit must equal to the applied voltage?
Ohm’s law
Voltage divider rule
KVL
KCL
Product over sum rule
- Which of the following is not a factor in the overall efficiency of a power supply
Input power
Output power
Temperature
Internal losses
Ambient noise
- When resistances are connected so that they have the same pair of nodes, the resistances are said to be in ______
- Which of the following meters or meter setting should never be used to troubleshoot a circuit that is energized?
Ammeter
Ohmmeter
Voltmeter
Probe
Oscilloscope
- Ammeters have a ____ value of internal resistance and must always be connected in _____ with the circuit
- For the circuit shown in Figure 3-18, determine the branch current l2
- In most electronic circuit calculations, if two quantities are within ____ % they are considered as approximately equal to each other
- For the circuit shown in Figure 3-24, determine the current flowing through resistor R3
10.A group of parallel connected resistors is often referred to as a ____ of resistors
- The point of connection between two or more branches is called a
- For the circuit shown in Figure 3-18, determine the branch current l2
- for the circuit shown in Figure 3-26, what is the voltage across resistor R3
- For the circuit shown in Figure 3-24, determine the current flowing through resistor R1
15 Which rule/law states that the total current flowing from the source is the sum of the individual branch currents.
Ohm’s Law
Current divider rule
KVL
KCL
Product-over sum rule
- Which rule/law states that the algebraic sum of all currents entering and leaving a node is zero?
Ohm’s Law Current divider rule
KVL
KCL
Product-over-sum rule
- The term ____ is used to describe the number of completely isolated circuits that are allowed to pass through the switch at a given time.
- In most electronic circuit calculation, if two quantities are within ____ % they are considered as approximately equal to each other.
- When a battery is fully charged, it has a ____ value of internal resistance, and as the charge decreases, the internal resistance ______
- Most Evs and ICE-powered vehicles use _____ ground systems
Positive
Earth
Common
Negative
DC
21.The SI unit of conductance is:
Ohm
Amp
Hertz
Siemens
Henry
- For the circuit shown in Figure 3-5 calculate the voltage dropped across resistor R1
- Use the voltage divider rule to find the voltage between points B and C in Figure 3-8
- For the circuit shown in Figure 3-19, calculate the current flowing through resistor R3
25.Low voltage fuses that are found in EVs and HEVs are rated for circuits generally no higher than ___ VDC
- When a battery ages its internal resistance ______ and the flow of current supplied by the battery _____
27.Use the voltage divider rule to find the voltage between points A and C in figure 3-7
28 For the circuit shown in Figure 3-21, determine the power dissipated in resistor R1
29.For the circuit shown in Figure 3-9 determine the amount of power consumed by resister R1
30For the circuit shown in Figure 3-4, determine the amount of current that will flow
31.Which rule/law states that the ratio between any two voltage drops in a series circuit is the same as the ratio of the two resistances across which these voltage drops occur?
Ohm’s Law
Voltage divider rule
KVL
KCL
Product-over-sum rule
32.Typical slow-blow fuses that are used on AC motors are designed to allow an overcurrent of ____ for ______
100%, 2 seconds
200%, 2 seconds
300%, 3 seconds
300%, 4 seconds
400%, 4 seconds
33 Which letter in Figure 3-10 indicates the schematic symbol for an earth ground?
- Determine the total resistance of the circuit shown in Figure 3-22
35.Which of the following meters or meter settings should never be used to troubleshoot a circuit that is energized?
Ahmeter
Ohmeter
Voltmeter
Probe
Oscilloscope
36For the circuit shown in Figure 3-6, calculate the voltage dropped across resister R2
37.Which of the following is not a factor in the overall efficiency of a power supply
Input power
Output power
Temperature
Internal losses
Ambient noise
38Which voltage sources have identical voltage ratings and different internal resistances, the source having the _____ internal resistance will supply the _______amount of current
Highest, least
Highest, largest
Lowest, largest
Lowest, least
Lowest, total
39Determine the internal resistance o the power supply shown in Figure 3-15 if the no load voltage of 13.5V is reduced to 12V when full load current of 5A flows
40.The batteries shown in Figure 3-11 are connected in a _____ – _______ configuration
41.A series circuit consisting of four resistors has the following values : R1 = 2.7 , R2=3.9, R3 = 6.8, R4= 5.1. If the voltage drop across R2 is 11.5V, what is the total voltage of the circuit
