ASVAB Electronics Information Practice Test 493711 Results

Your Results Global Average
Questions 5 5
Correct 0 3.47
Score 0% 69%

Review

1

This circuit diagram represents a(n):

69% Answer Correctly

open circuit

series-parallel circuit

series circuit

parallel circuit


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.


2

The ohm is a unit of measurement for:

81% Answer Correctly

power

capacitance

resistance

energy


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.


3

Resistance is opposition to which of the following?

70% Answer Correctly

voltage

impedance

conductance

current


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.


4

Which of the following is not a characteristic of direct current?

47% Answer Correctly

electrons flow in only one consistent direction

used to power your cell phone

cannot easily travel distances without power loss

an example power source is a generator


Solution

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of DC is a battery. In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.


5 Use Ohm's Law to calculate the value of current in this circuit if voltage is 480 volts and resistance is 60 Ω.
81% Answer Correctly
16 A
8.8 A
8 A
9.5 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 = \( \frac{V}{R} \) = \( \frac{480}{60} \) = 8 A