Electrical circuits exam 1
50 mA of current flow through a 10 kiloohm resistor. How much power is dissipated?
25 watts
Four 470 ohm +5% resistors are measured with an ohmmeter. One of the measured resistor values is not within the +5% tolerance. Which one of the following readings is out of bounds
445.0 ohms
See Figure 5.3. The total current is
-500pA
See Figure 9.2. Using the superposition theorem, what is the portion of the current through the 6 0 resistor caused by the 8 V battery?
0 A
See Figure 5.1. The total current flowing from the battery is
1 mA
See Figure 5.1. The total resistance in this circuit is
10 kiloohms
See Figure 8.1. When converted to a voltage source, the equivalent series resistance is
10 ohms
A 10 k ohm resistor has a conductance of
10^-4 siemens
See Figure 6.2. What is the value of I ? Use Kirchhoff's current law to determine the answer
11 A
How much power is dissipated by a light bulb if its applied voltage is 12 V and its resistance is 12 ohm?
12 watts
A circuit has a source voltage of 15 volts and two resistors i h a total resistance of 4000 ohms. If Ri has a potential of 9.375 volts, wham is the value of R2
1500 ohms
See Figure 8.1. What is I subscript L
29.7 mA
See Figure 8.1. When converted to a voltage source, the equivalent voltage is
30 V
What voltage is developed across a 330 ohm resistor if 100 mA of current flows through it?
33V
See Figure 5.1. The total power dissipated by the 7 kiloohms resistor is
7 mW
See Figure 5.3. Which one of the following statements is true if the 10 V battery is replaced by a 15 V battery
Current will drop to zero
See Figure 8.4. Which equation describes node X
I_3=I_2+I_1
Which one of these statements describes an ideal voltage source
It provides a fixed terminal voltage, even though the current demand may vary
Which one statement is true of resistors in a series circuit?
Large-value resistors dissipate more power than small-value resistors.
Which one of these statements is true of Kirchhoff's voltage law
The KVL technique words correctly with either clockwise loop direction or counter-clockwise loop direction.
Given a series circuit containing resistors of different values, which statement is not true?
The voltage drop across each resistor will be the same
Current flowing from a battery is measured by placing an ammeter across the battery terminals
false
The power dissipated by a resistor doubles if the applied voltage doubles
false
When a 10 kiloohm resistor, a 1 kiloohm resistor, and a 100 ohm resistor are connected in series, the current through each resistor is the same, and the voltage across each resistor is the same
false
When using mesh analysis, each loop muse be drawn in the clockwise direction
false
how must ammeters be connected in a circuit when used to measure current
in series with the component being measured
which one of these statements is true of the ohmmeter
it displays a resistance of zero if the leads touch each other and an infinite reading if there is no connection at all
In double-subscript notation, V_ab = +7 V denotes that
point b is 7 V more positive than point a
Kirchhoff's voltage law states that
the algebraic sum of the potential rises and drops around a closed loop is zero
A 1000 watt load that operates for one hour consumes the same amount of energy as a 100 watt load that operates for 10 hours
true
A current source determines the current in the branch in which it is located
true
Ohm's law shows that current is directly proportional to the applied voltage and is inversely proportional to resistance
true
Resistance decreases as the cross-sectional area of a conductor increases
true
Resistance is directly proportional to the length of a conductor
true
The resistance calculated using Norton's theorem is equal to the resistance calculated using Thevenin's theorem for the same electrical network
true
The sum of the voltage drops in a series circuit is always equal to the applied voltage
true
Thevenin's theorem permits the reduction of any two-terminal linear dc network to one having a single voltage source and series resistance
true