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