ASVAB Electronics Information Practice Test 368379 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.72
Score	0%	74%

Review

What is the voltage of most household electrical systems in the United States?

59% Answer Correctly

	60Hz
	60V
	110V
	220V

Solution

Most households use electricity with a voltage of 110V.

2 A circuit with a 120-volt power supply is protected by a 25-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

82% Answer Correctly

	3300 W
	3000 W
	6000 W
	3002 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 25A circuit breaker would allow is 120V x 25A = 3000 W.

The valence shell of a semiconductor is how full of electrons?

67% Answer Correctly

	less than half full
	half full
	more than half full
	empty

Solution

Semiconductors have valence shells that are exacly half full and can conduct electricity under some conditions but not others. This property makes them useful for the control of electrical current.

4 Use Ohm's Law to calculate the value of current in this circuit if voltage is 15 volts and resistance is 30 Ω.

81% Answer Correctly

	0.5 A
	0.17 A
	2 A
	0.55 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 = \( \frac{V}{R} \) = \( \frac{15}{30} \) = 0.5 A

5 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 90 Ω and current is 10 amps.

85% Answer Correctly

	990 V
	300 V
	900 V
	1800 V

Solution

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

V = \( I \times R \) = \( 10 \times 90 \) = 900 V