sa_enygy

50. While putting four 1.5 V batteries in a flashlight, you accidentally put one of them in backward. The light will be

• the same

• dimmer than normal

• brighter than normal

• off      

If you measure all the voltage drops and the source voltage in a series circuit and add them
together, taking into consideration the polarities, you will get a result equal to

• zero

• the source voltage

• the total of the source voltage and the voltage drops

• the total of the voltage drops

52. There are six resistors in a given series circuit and each resistor has 5 V dropped across it. The
source voltage is

• 30 V

• 5 V

• dependent on the resistor values

• dependent on the current

53. A series circuit consists of a 4.7 kΩ, a 5.6 kΩ and a 10kΩ resistor. The resistor that has the
most voltage across it is

• the 4.7 kΩ

• the 10kΩ

• impossible to determine from the given information

• the 5.6 kΩ

54. Which of the following series combinations dissipates the most power when connected across a 100 V source?

• one 100 Ω resistor

• three 100 Ω resistors

• four 100 Ω resistors

• two 100 Ω resistors

55. The total power in a certain circuit is 1 W. Each of the five equal-value series resistors making up the circuit dissipates

• 1 W

• 5 W

• 0.5 W

• 0.2 W

56. When you connect an ammeter in a series resistive circuit and turn on the source voltage, the meter reads zero. You should check for

• a broken wire

• a shorted resistor

• an open resistor

• both (a) and (c)

57. While checking out a series resistive circuit, you find that the current is higher than it should
be. You should look for

• an open circuit

• a short

• a low resistor value

• both (b) and (c)

In a parallel circuit, each resistor has

• the same voltage

• the same current

• all of the above

• the same power          

When a 1.2 kΩ resistor and a 100 Ω resistor are connected in parallel, the total resistance is

• less than 90 Ω

• greater than 100 Ω but less than 1.2 kΩ

• less than 100 Ω but greater than 90 Ω

• greater than 1.2 kΩ