ASVAB Electronics Information Practice Test 222828 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.62
Score	0%	72%

Review

1 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 15 volts and current is 1.5 amps.

80% Answer Correctly

	10 Ω
	12 Ω
	13 Ω
	11 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 = \( \frac{V}{I} \) = \( \frac{15}{1.5} \) = 10 Ω

Which of the following will increase the magnetic field produced by the electric current in a wire?

68% Answer Correctly

	wrap the wire around a ceramic core
	construct the wire from conductive material
	wind the wire into a coil
	construct the wire from insulative material

Solution

A moving electric current produces a magnetic field proportional to the amount of current flow. This magnetic field can be made stronger by winding the wire into a coil and further enhanced if done around an iron containing (ferrous) core.

Which of the following is the formula for calculating electrical power?

73% Answer Correctly

	P = IV
	\(P = {V \over I}\)
	P = I²V
	\(P = {I \over V}\)

Solution

Electrical power is measured in watts (W) and is calculated by multiplying the voltage (V) applied to a circuit by the resulting current (I) that flows in the circuit: P = IV. In addition to measuring production capacity, power also measures the rate of energy consumption and many loads are rated for their consumption capacity. For example, a 60W lightbulb utilizes 60W of energy to produce the equivalent of 60W of heat and light energy.

Which of the following statements about electrical resistance is true?

75% Answer Correctly

	the more resistive the conductor is the slower electron flow will be
	the less resistive the conductor is the slower electron flow will be
	electrically conductive materials have no resistive properties
	the more resistive the conductor is the faster electron flow will be

Solution

Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.

An engineer who wants to document an electric circuit would create which of the following?

67% Answer Correctly

	a blueprint
	a layout
	a schematic
	a matrix

Solution

A schematic is the proper name for a drawing of an electric or electronic circuit.