ASVAB Electronics Information Practice Test 547291 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.41
Score	0%	68%

Review

From what energy do photovoltaic cells produce electrical energy?

68% Answer Correctly

	sun
	chemical
	nuclear
	magnetic

Solution

A photovoltaic cell (also known as a solar cell) converts energy from the sun into electrical energy.

2 Suppose you have 6 [9V 20A] batteries that you can connect together in series, in parallel, or in series-parallel. Which of the following voltage and ampere combinations cannot be attained using these 6 batteries?

46% Answer Correctly

	6V 180A
	9V 120A
	54V 20A
	27V 60A

Solution

Connecting the 6 batteries in series multiplies their voltage while keeping their current the same yielding a 54V 20A configuration. Connecting the 6 batteries in parallel multiplies their current while keeping their voltage the same yielding a 9V 120A configuration. Using a series-parallel connection, 3 batteries can be connected in series and 3 can be connected in parallel resulting in a 27V 60A configuration.

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
	a capacitor remains charged even after the input voltage is removed
	to discharge a capacitor safely, use a high-wattage resistor comparable to the capacitance of the capacitor

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.

4 What's the overall power consumption of a piece of equipment that is rated for 8 amps at 10 volts?

80% Answer Correctly

	85 W
	88 W
	40 W
	80 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 8 amps (I) at 10 volts (V) so the equation becomes P = \( 10 \times 8 \) = 80 W

If an electrical circuit is interrupted, which of the following will result?

61% Answer Correctly

	closed circuit
	short circuit
	open circuit
	parallel circuit

Solution

A closed circuit is a complete loop or path that electricity follows. It consists of a source of voltage, a load, and connective conductors. If the circuit is interrupted, if a wire is disconnected or cut for example, it becomes an open circuit and no electricity will flow.