ASVAB Electronics Information Practice Test 66 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.43
Score	0%	69%

Review

This circuit component symbol represents a(n):

57% Answer Correctly

	capacitor
	transformer
	AC source
	DC source

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.

2 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 160 volts and current is 2 amps.

81% Answer Correctly

	72 Ω
	88 Ω
	80 Ω
	83 Ω

Solution

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

Solved for resistance, R = \( \frac{V}{I} \) = \( \frac{160}{2} \) = 80 Ω

The formula specifying Ohm's law is which of the following?

77% Answer Correctly

	\(V = {R \over I}\)
	V = IR
	V = I²R
	\(V = {I \over R}\)

Solution

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

Which of the following converts electrical energy into another form of energy in an electrical circuit?

61% Answer Correctly

	AC source
	load
	DC source
	wiring

Solution

A load is a source of resistance that converts electrical energy into another form of energy. The components of a microwave, for example, are loads that work together to convert household electricity into radation that can be used to quickly cook food.

Capacitors store:

68% Answer Correctly

	resistance
	current
	electricity
	capacitance

Solution

Capacitors store electricity and are used in circuits as temporary batteries. Capacitors are charged by DC current (AC current passes through a capacitor) and that stored charge can later be dissipated into the circuit as needed. Capacitors are often used to maintain power within a system when it is disconnected from its primary power source or to smooth out or filter voltage within a circuit.