ASVAB Electronics Information Practice Test 647756 Results

Your Results Global Average
Questions 5 5
Correct 0 3.78
Score 0% 76%

Review

1 Use Ohm's Law to calculate the value of current in this circuit if voltage is 360 volts and resistance is 40 Ω.
82% Answer Correctly
9.9 A
10.5 A
9 A
4.5 A
Solution

Ohm's law specifies the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit: V = IR.

Solved for current, I = \( \frac{V}{R} \) = \( \frac{360}{40} \) = 9 A

2

The conversion of alternating current (AC) into direct current (DC) is called:

69% Answer Correctly

rectification

capacitance

reactance

inductance
Solution

A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.

3 What's the overall power consumption of a piece of equipment that is rated for 8 amps at 90 volts?
92% Answer Correctly
360 W
720 W
792 W
648 W
Solution
Power is measured in watts (W) and 1 watt equals 1 ampere multiplied by 1 volt: P = \( V \times I \). For this problem, the equipment is rated for 8 amps (I) at 90 volts (V) so the equation becomes P = \( 90 \times 8 \) = 720 W
4

Voltage and current are __________ proportional.

66% Answer Correctly

inversely

not

indirectly

directly
Solution

Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.

5

What is the primary difference between a rectifier and an inverter?

61% Answer Correctly

a rectifier converts a DC input to AC while an inverter converts an AC input to DC

a rectifier strips out the DC portion of electricity while an inverter strips out the AC portion

a rectifier converts an AC input to DC while an inverter converts a DC input to AC

a rectifier strips out the AC portion of electricity while an inverter strips out the DC portion
Solution

A diode allows current to pass easily in one direction and blocks current in the other direction. Diodes are commonly used for rectification which is the conversion of alternating current (AC) into direct current (DC). Because a diode only allows current flow in one direction, it will pass either the upper or lower half of AC waves (half-wave rectification) creating pulsating DC. Multiple diodes can be connected together to utilize both halves of the AC signal in full-wave rectification.