ASVAB Electronics Information Practice Test 902070 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.45
Score	0%	69%

Review

Why does current in an electric circuit create heat?

77% Answer Correctly

	heat is created when the current overcomes resistance in the wire
	the wire in the circuit burns when current passes through
	voltage is naturally hot
	current is naturally hot

Solution

Current in an electric circuit creates heat when the current overcomes resistance in the wire.

In a series circuit, which of the following is the same across all branches of the circuit?

61% Answer Correctly

	conductance
	voltage
	resistance
	current

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.

3 A circuit with a 120-volt power supply is protected by a 15-amp circuit breaker. What is the largest number of watts loads on this circuit can safely use?

82% Answer Correctly

	2700 W
	1980 W
	1800 W
	600 W

Solution

Wattage is current multiplied by voltage: W = IV. So, the maximum amount of power a 120-volt circuit with a 15A circuit breaker would allow is 120V x 15A = 1800 W.

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

52% Answer Correctly

	double
	less than
	more than
	triple

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.

One of the lights on your Christmas tree burns out and this causes the rest of the lights connected to that strand to go dark. How are the lights in that strand connected?

73% Answer Correctly

	series-parallel
	perpendicular
	series
	parallel

Solution

Lights connected in series form a chain with each light connecting to adjacent lights via one wire. Therefore, if one of the lights burns out and breaks the series, none of the other lights will receive power and they'll go dark. Lights connected in parallel each connect to the positive and negative nodes of the power source and would not go dark if one of their neighbors burnt out.