Resistors-Series and Parallel
2. The resistance of a wire depends on the _____ of the wire.
-length -thickness -material
7. Two resistors connected in parallel, with R1 = 150 ohms and R2 = 75 ohms, are connected to a battery that experiences a current of 0.18 A. The current through R1 is _____ A.
0.06
11. A 1.5 V battery is connected to a 1000 ohm resistor and a 500 ohm resistor in series. The voltage across the 1000 ohm resistor is _____ V.
1
6. The equivalent resistance of three resistors connected in series, each with a resistance of 50.0 ohms, is _____ ohms.
150
14. The equivalent resistance of R1 = 1000 ohms and R2 = 1500 ohms connected in parallel is _____ ohms.
600
Moves from the positive terminal of a battery to the negative terminal
Conventional current
Parallel
Current through each each resistor depends on the resistance of the resistor
Moves from the negative terminal of a battery to the positive terminal
Electron current
T/F
F-Current equals the product of voltage and resistance for an ohmic device
T/F
F-The potential difference produced by a battery varies depending on the circuit in which it is used
T/F
F-the thicker an electrical wire, the higher the resistance of the wire
1. Resistance is a measure of the difficulty required to push voltage through an electrical device.
False
13. When using a digital multimeter (DMM) as an ohmmeter, the circuit should always be complete (connected to a battery or other energy source).
False
16. The power dissipated by two resistors connected in series is always greater than the power dissipated by the same two resistors connected in parallel.
False
7. Kirchhoff's junction rule states that the total electric potential entering a junction equals that leaving the junction.
False
8. Power is the work per unit charge in a circuit.
False
Work per unit charge
Potential difference
Series
Power is the same in each resistor
2. _____ is dependent upon the material from which a resistor is constructed.
Resistivity
Depends on material, measures how strongly a material resists the flow of charge
Resistivity
T/F
T-The greater the length of a wire, the higher the resistance of the wire
T/F
T-the power produced by a battery varies depending on the circuit in which it is used
Parallel
Total current through the circuit is equal to the sum of the current through each resistor
Series
Total voltage of the battery is equal to the sum of the voltages across each resistor
1. The larger the resistance of a device, the more difficult it is for charge to move through the device.
True
10. A circuit that draws a large amount of power will discharge a battery faster than a circuit that draws a small amount of power.
True
15. The equivalent resistance of two resistors connected in series is always greater than the equivalent resistance of the same two resistors connected in parallel.
True
17. A brighter light bulb dissipates more power than a dimmer light bulb.
True
5. Voltage and electric potential difference are two terms for the same quantity.
True
9. An efficient LED light bulb dissipates less power for the same illumination as a typical incandescent light bulb.
True
Series
Voltage across each resistor depends on the resistance of the resistor
Parallel
Voltage is the same across each resistor
4. Current is measured in units of _____.
amperes
3. A _____ consists of graphite mixed with clay and hardened.
carbon composition resistor
3.The _____ is the rate of flow of charges past a particular point in a circuit.
current
8. Resistors combined in series all have the same _____.
current
18. Two identical light bulbs connected in series will be _____ the same two identical light bulbs connected in parallel.
dimmer than
5. Kirchhoff's loop rule states that the total change in _____ around a closed loop is zero.
electrical potential
6. Conventional current moves from the negative terminal to the positive terminal of a battery in a circuit.
false
9. The equivalent resistance of resistors combined in parallel is the _____ of the individual resistances.
inverse of the sum of the inverse
12. When using a digital multimeter (DMM) to measure voltage across a resistor, the leads should be connected in _____ with the resistor.
parallel
A measure of the difficulty required to push charges through a device
resistance
An electrical device that limits the flow of electric charge
resistor
The schematic diagram represents three resistors in _____.
series
4. Ohm's law states that the current is proportional to the _____ and inversely proportional to the _____.
voltage; resistance
