B-005-06: Power law, resistor power dissipation
B-005-06-01:
Why would a large size resistor be used instead of a smaller one of the same resistance?
For greater power dissipation
For better response time
For a higher current gain
For less impedance in the circuit
B-005-06-02:
How many watts of electrical power are used by a 12-VDC light bulb that draws 0.2 ampere?
2.4 watts
60 watts
24 watts
6 watts
B-005-06-03:
The DC input power of a transmitter operating at 12 volts and drawing 500 milliamps would be:
6 watts
20 watts
500 watts
12 watts
B-005-06-04:
When two 500 ohm 1 watt resistors are connected in series, the maximum total power that can be dissipated by the resistors is:
2 watts
1 watt
1/2 watt
4 watts
B-005-06-05:
When two 500 ohm 1 watt resistors are connected in parallel, they can dissipate a maximum total power of:
2 watts
1/2 watt
1 watt
4 watts
B-005-06-06:
If the voltage applied to two resistors in series is doubled, how much will the total power change?
increase four times
decrease to half
double
no change
B-005-06-07:
If the power is 500 watts and the resistance is 20 ohms, the current is:
5 amps
2.5 amps
10 amps
25 amps
B-005-06-08:
A 12 volt light bulb is rated at a power of 30 watts. The current drawn would be:
30/12 amps
18 amps
360 amps
12/30 amps
B-005-06-09:
If two 10 ohm resistors are connected in series with a 10 volt battery, the power consumption would be:
5 watts
10 watts
20 watts
100 watts
B-005-06-10:
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:
the same resistance but greater power rating
the same resistance but lesser power rating
greater resistance and similar power rating
lesser resistance and similar power rating
B-005-06-11:
Resistor wattage ratings are:
determined by heat dissipation qualities
calculated according to physical size
expressed in joules per second
variable in steps of one hundred
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