ASVAB Electronics Information Practice Test 10929 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.31
Score	0%	66%

Review

1 Use Ohm's Law to calculate the value of current in this circuit if voltage is 180 volts and resistance is 90 Ω.

81% Answer Correctly

	2 A
	-1 A
	6 A
	10 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 = \( \frac{V}{R} \) = \( \frac{180}{90} \) = 2 A

The electrical potential difference between two points is called:

60% Answer Correctly

	resistance
	current
	conductance
	voltage

Solution

Voltage (V) is the electrical potential difference between two points. Electrons will flow as current from areas of high potential (concentration of electrons) to areas of low potential. Voltage and current are directly proportional in that the higher the voltage applied to a conductor the higher the current that will result.

The diameter of a number 12 wire is __________ the diameter of a number 6 wire?

52% Answer Correctly

	double
	triple
	less than
	more than

Solution

The larger the number the smaller the diameter of the wire. So, the diameter of a number 12 wire is less than the diameter of a number 6 wire.

This circuit diagram represents a(n):

65% Answer Correctly

	rectifier
	parallel circuit
	series-parallel circuit
	series circuit

Solution

In a parallel circuit, each load occupies a separate parallel path in the circuit and the input voltage is fully applied to each path. Unlike a series circuit where current (I) is the same at all points in the circuit, in a parallel circuit, voltage (V) is the same across each parallel branch of the circuit but current differs in each branch depending on the load (resistance) present.

Which of the following statements about a capacitor is false?

77% Answer Correctly

	it is safe to touch a capacitor with your hands as long as it is small
	you should always discharge any capacitors before working on an electronic circuit
	to discharge a capacitor safely, use a high-wattage resistor comparable to the capacitance of the capacitor
	a capacitor remains charged even after the input voltage is removed

Solution

The purpose of a capacitor is to retain electric charge and it will do so even after its input voltage is removed. After the input voltage is removed, the capacitor will slowly discharge but, depending on the size and characteristics of the capacitor, discharging could take from a few minutes to a few years. So, it's never safe to touch a capacitor with your hands and you should make sure to discharge any capacitors in a circuit before working on it using an appropriately high-wattage resistor or a capacitor discharge tool.