ASVAB Electronics Information Practice Test 171705 Results

Your Results Global Average
Questions 5 5
Correct 0 3.63
Score 0% 73%

Review

1

Why does current in an electric circuit create heat?

77% Answer Correctly

heat is created when the current overcomes resistance in the wire

voltage is naturally hot

current is naturally hot

the wire in the circuit burns when current passes through
Solution

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

2

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

68% Answer Correctly

construct the wire from insulative material

wrap the wire around a ceramic core

wind the wire into a coil

construct the wire from conductive 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.

3

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

60% Answer Correctly

current

conductance

voltage

resistance
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.

4

Which of these materials is not a good conductor of electricity?

79% Answer Correctly

gold

tin

copper

air
Solution

All conductors have resistance and the amount of resistance varies with the element. In general, metals make the best conductors of electricity and non-metals make the worst conductors of electricity.

5

You would measure the amount of resistance at a certain point in a circuit with a(n):

78% Answer Correctly

voltmeter

potentiometer

ohmmeter

ammeter
Solution

Resistance is opposition to the flow of current and is measured in ohms (Ω). An ohmmeter is used to measure the amount of resistance at a certain point in a circuit.