Question set #12
To say that an electrical device has a current of 100 Amps flowing through it means that
100 coulombs of charge enter and leave the device every second
To say that an electrical device has 100 Watts of power means that
100 joules of electric potential energy are transferred each second.
Three 300-ohm resistors in parallel give an equivalent resistance of
100 ohms
Two 200-ohm resistors in parallel give an equivalent resistance of
100 ohms
A 4-ohm resistor is connected in parallel with a 4-ohm resistor. This combination produces an equivalent resistance of
2 ohms
The current through a 5.0 ohm resistor connected to a 100.0 V power supply is
20 A
When a 10.0 V battery is connected to a resistor, the current through the resistor is 2.0 A. What is the resistor's value?
5 ohms
When a 20.0 V battery is connected to a resistor, the current through the resistor is 4.0 A. What is the resistor's value?
5 ohms
The current through a 10.0 ohm resistor connected to an 60.0 V power supply is
6 A
The current through a 10.0 ohm resistor connected to an 80.0 V power supply is
8 A
Several light bulbs are connected in a circuit. When the switch is closed
All bulbs light at once
As more and more cells are added in parallel to a circuit containing a single light bulbs, the brightness of the bulb
Does not change
To say that an electrical battery has an electric potential difference of 300 Volts means that
Each coulomb of charge gains 300 joules of electric potential energy
The brightness of a bulb depends on how much ____________________ is converted into light energy each second.
Electrical energy
To say that an electrical device has a resistance of 200-ohms means that
It would take 200 volts to cause 1 amp of current through the device
Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have
Less resistance
When two lamps are connected in series to a battery, the total electrical resistance that the battery senses is
More than the resistance of either lamp
Which resistor arrangement will result in the greatest total current?
Parallel
Which circuit, X or Y, will have the greatest total potential difference
Potential difference is the same in each
If 5 identical bulbs are connected in parallel and one bulb goes out, the others
Remain unchanged
The same circuit relationships that are true for resistors are true for light bulbs
True