ASVAB Electronics Information Practice Test 203064 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.51
Score	0%	70%

Review

This circuit component symbol represents a(n):

60% Answer Correctly

	transformer
	capacitor
	inductor
	resistor

Solution

An inductor is coiled wire that stores electric energy in the form of magnetic energy and resists changes in the electric current flowing through it. If current is increasing, the inductor produces a voltage that slows the increase and, if current is decreasing, the magnetic energy in the coil opposes the decrease to keep the current flowing longer. In contrast to capacitors, inductors allow DC to pass easily but resist the flow of AC.

The ampere is a unit of measurement for:

79% Answer Correctly

	inductance
	current
	power
	energy

Solution

Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.

3 Use Ohm's Law to calculate the value of current in this circuit if voltage is 140 volts and resistance is 20 Ω.

81% Answer Correctly

	7 A
	6.3 A
	10 A
	2.33 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 = \( \frac{V}{R} \) = \( \frac{140}{20} \) = 7 A

4 What's the overall power consumption of a piece of equipment that is rated for 3 amps at 10 volts?

80% Answer Correctly

	32 W
	15 W
	30 W
	45 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 3 amps (I) at 10 volts (V) so the equation becomes P = \( 10 \times 3 \) = 30 W

Inductance is a factor in which of the following?

44% Answer Correctly

	determining energy stored by a capacitor
	a DC circuit
	an AC circuit
	batteries connected in serial

Solution

Inductance is a property of an AC circuit (or a component in an AC circuit) that quantifies resistance to changes in current. The current in an AC circuit is continuously changing and inductive reactance (the opposition to change) depends both on the inductance of the circuit or component and the rate at which the current is changing.