ASVAB Electronics Information Practice Test 148176 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.60
Score	0%	72%

Review

1 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 105 volts and current is 3.5 amps.

80% Answer Correctly

	90 Ω
	30 Ω
	32 Ω
	24 Ω

Solution

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

Solved for resistance, R = \( \frac{V}{I} \) = \( \frac{105}{3.5} \) = 30 Ω

This circuit component symbol represents a(n):

55% Answer Correctly

	fuse
	inductor
	transformer
	potentiometer

Solution

Resistors are used to limit voltage and/or current in a circuit and can have a fixed or variable resistance. Variable resistors (often called potentiometers or rheostats) are used when dynamic control over the voltage/current in a circuit is needed, for example, in a light dimmer or volume control.

Why does current in an electric circuit create heat?

77% Answer Correctly

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

Solution

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

A diode to an electronic circuit is like a _______________ to a city?

67% Answer Correctly

	highway
	one-way street
	parking lot
	traffic light

Solution

A diode allows current to pass easily in one direction and blocks current in the other direction.

The volt is a unit of measurement for:

79% Answer Correctly

	capacitance
	current
	voltage
	power

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.