ASVAB Electronics Information Practice Test 743198 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.39
Score	0%	68%

Review

Which of the following is not a terminal on a transistor?

59% Answer Correctly

	emitter
	base
	collector
	input

Solution

A transistor works by allowing a small amount of current applied at the base to control general current flow from collector to emitter through the transistor.

Resistance is opposition to which of the following?

70% Answer Correctly

	voltage
	current
	conductance
	impedance

Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.

This circuit diagram represents a(n):

68% Answer Correctly

	open circuit
	series-parallel circuit
	series circuit
	parallel circuit

Solution

A series circuit has only one path for current to flow. In a series circuit, current (I) is the same throughout the circuit and is equal to the total voltage (V) applied to the circuit divided by the total resistance (R) of the loads in the circuit. The sum of the voltage drops across each resistor in the circuit will equal the total voltage applied to the circuit.

4 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 20 Ω and current is 0.5 amps.

85% Answer Correctly

	3.33 V
	20 V
	10 V
	12 V

Solution

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

V = \( I \times R \) = \( 0.5 \times 20 \) = 10 V

This circuit component symbol represents a(n):

57% Answer Correctly

	AC source
	transformer
	DC source
	capacitor

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.