ASVAB Electronics Information Practice Test 654231 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.25
Score	0%	65%

Review

Which of the following is not a common type of battery?

41% Answer Correctly

	deep-cycle
	dry cell
	power-cycle
	wet cell

Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of direct current (DC) is a battery. The three most common types of batteries are dry cell (used in small devices like TV remotes), wet cell (used for cars), and deep-cycle (storage batteries used primarily for backup and emergency power).

2 Use Ohm's Law to calculate the value of current in this circuit if voltage is 260 volts and resistance is 40 Ω.

80% Answer Correctly

	6.5 A
	13 A
	3.25 A
	2.17 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 = \( \frac{V}{R} \) = \( \frac{260}{40} \) = 6.5 A

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

61% Answer Correctly

	a rectifier converts an AC input to DC while an inverter converts a DC input to AC
	a rectifier strips out the DC portion of electricity while an inverter strips out the AC portion
	a rectifier converts a DC input to AC while an inverter converts an AC input to DC
	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.

The joule is a unit of measurement for:

67% Answer Correctly

	capacitance
	energy
	power
	resistance

Solution

The joule is a unit of measurement for energy.

Why does current in an electric circuit create heat?

77% Answer Correctly

	current is naturally hot
	heat is created when the current overcomes resistance in the wire
	the wire in the circuit burns when current passes through
	voltage is naturally hot

Solution

Current in an electric circuit creates heat when the current overcomes resistance in the wire.