Why would a large size resistor be used instead of a smaller one of the same resistance?

How many watts of electrical power are used by a 12-VDC light bulb that draws 0.2 ampere?

The DC input power of a transmitter operating at 12 volts and drawing 500 milliamps would be:

When two 500 ohm 1 watt resistors are connected in series, the maximum total power that can be dissipated by the resistors is:

When two 500 ohm 1 watt resistors are connected in parallel, they can dissipate a maximum total power of:

If the voltage applied to two resistors in series is doubled, how much will the total power change?

If the power is 500 watts and the resistance is 20 ohms, the current is:

A 12 volt light bulb is rated at a power of 30 watts. The current drawn would be:

If two 10 ohm resistors are connected in series with a 10 volt battery, the power consumption would be:

One advantage of replacing a 50 ohm resistor with a parallel combination of two similarly rated 100 ohm resistors is that the parallel combination will have:

Resistor wattage ratings are: