ASVAB Electronics Information Practice Test 816073 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.63
Score	0%	73%

Review

1 Use Ohm's Law to calculate the value of current in this circuit if voltage is 300 volts and resistance is 60 Ω.

81% Answer Correctly

	15 A
	5.5 A
	7 A
	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 = \( \frac{V}{R} \) = \( \frac{300}{60} \) = 5 A

2 A circuit with a 120-volt power supply is protected by a 20-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

82% Answer Correctly

	800 W
	2401.5 W
	2400 W
	2392 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 20A circuit breaker would allow is 120V x 20A = 2400 W.

Resistance is opposition to which of the following?

70% Answer Correctly

	current
	conductance
	impedance
	voltage

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 component symbol represents a(n):

70% Answer Correctly

	capacitor
	resistor
	fuse
	diode

Solution

Fuses are thin wires that melt when the current in a circuit exceeds a preset amount. They help prevent short circuits from damaging circuit components when an unusually large current is applied to the circuit, either through component failure or spikes in applied voltage.

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

59% Answer Correctly

	collector
	base
	input
	emitter

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.