ASVAB Electronics Information Practice Test 257445 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.88
Score	0%	78%

Review

The ampere is a unit of measurement for:

79% Answer Correctly

	power
	energy
	current
	inductance

Solution

Current is the rate of flow of electrons per unit time and is measured in amperes (A). A coulomb (C) is the quantity of electricity conveyed in one second by a current of one ampere.

2 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 100 volts and current is 5 amps.

81% Answer Correctly

	21.5 Ω
	20 Ω
	60 Ω
	18 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 = \( \frac{V}{I} \) = \( \frac{100}{5} \) = 20 Ω

3 Use Ohm's Law to calculate the value of voltage in this circuit if resistance is 10 Ω and current is 8 amps.

85% Answer Correctly

	40 V
	89 V
	160 V
	80 V

Solution

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

V = \( I \times R \) = \( 8 \times 10 \) = 80 V

Resistance is measured in:

86% Answer Correctly

	ohms
	amperes
	coulombs
	volts

Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). One ohm is defined as the amount of resistance that will allow one ampere of current to flow if one volt of voltage is applied. As resistance increases, current decreases as resistance and current are inversely proportional.

What is the potential difference in an electrical circuit a measure of?

58% Answer Correctly

	the current at a specific location in the circuit
	the load at a specific location in the circuit
	the voltage at a specific location in the circuit
	the resistance at a specific location in the circuit

Solution

Electrons flow from an area of high concentration to an area of low concentration. A high voltage indicates a high concentration of electrons that creates a greater potential for electron flow than a low voltage. When applied to a load, voltage creates electricity and potential difference is the measure of voltage at a specific location in an electrical circuit.