Chapter 23

Just as in hydraulic circuits there is water pressure, in electric circuits there is

To think of electric potential difference we are thinking about

Voltage is most similar to

A suitable electric pump in an electric circuit is a

It is correct to say that in electric circuits

Unit of electric resistance

If two copper wires of the same length have different thickness, then the thicker wire has

If you stretch a copper wire so that it is thinner, the resistance between its ends

When you turn on a lamp, the initial current in its filament is greater at first, rather than a moment later, which indicates

Electric resistance in our skin is lowered when our skin is

The voltage across a 10-ohm resistor carrying 5 A is

The current in two identical light bulbs connected in series is 0.25 A. The voltage across both bulbs is 110 V. The resistance of a single light bulb is

Alternating current is normally produced by a

A capacitor is useful in

For electric current in the home, your power company supplies

The source of electrons that illuminate a common lamp in your home is

Electrons that are energized to glow in the filament of a common ac lamp are

When Eddie Electron experiences an electrical shock, the source of electrons composing the shock is

Electrons flow in an electric circuit by

The electric field established by a generator in an ac circuit

In units of measurement, power in watts is equal to

One kilowatt is a unit of

The electric power supplied to a lamp that carries 2 A at 120 V is

A 100-W lamp glows brighter than a 25-W lamp. The current drawn by the 100-W lamp is

The energy dissipated in a light bulb in a circuit is provided by the

A 60-W light bulb connected to a 120-V source draws a current of

A power line with a resistance of 2 ohms carries a current of 80 A. The power dissipated in the line is

The power dissipated in a 4-ohm resistor carrying 3 A is

The current drawn by a 1200-W toaster connected to 120 V is 10 A. The resistance of the toaster coils is

A heater draws 20A when connected to a 110-V line. If the electric power costs 20 cents per kilowatt hour, the cost of running the heater for 10 hours is

A lamp rated 23W 120V means that it will deliver 23 W

The amount of current in an incandescent bulb rated 75W 120V is about

Compared with the amount of current in the filament of a lamp, the amount of current in the connecting wires is

By convention, the direction of current in a circuit is

When two lamps are connected in series to a battery, the electrical resistance that the battery senses is

When a pair of identical lamps are connected in parallel

Modern automobile headlights are connected in

The safety fuse in an electric circuit is connected to the circuit in

Something in the current in lamps is too feeble to produce glowing of the lamp filaments, which occurs when

As more lamps are connected in a parallel circuit, the overall current in the power source

To connect a pair of resistors so their equivalent resistance (the single resistor having their combined value) will increase, connect them in

The equivalent resistance of any parallel branch in a circuit is

When a pair of 1-ohm resistors are connected in series, their equivalent (combined) resistance is 2 ohms, and when connected in parallel is