ASVAB Electronics Information Practice Test 306480 Results

Your Results Global Average
Questions 5 5
Correct 0 3.68
Score 0% 74%

Review

1

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

61% Answer Correctly

resistance

current

conductance

voltage
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 Use Ohm's Law to calculate the value of resistance in this circuit if voltage is 160 volts and current is 2 amps.
80% Answer Correctly
40 Ω
80 Ω
240 Ω
88 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 = \( \frac{V}{I} \) = \( \frac{160}{2} \) = 80 Ω

3

Which of the following is a difference between a circuit breaker and a fuse?

80% Answer Correctly

a circuit breaker can be reused

a fuse is cheaper than a circuit breaker

all of these

a fuse responds more quickly than a circuit breaker
Solution

Like fuses, circuit breakers stop current flow once it reaches a certain amount. They have the advantage of being reusable (fuses must be replaced when "blown") but respond more slowly to current surges and are more expensive than fuses.

4

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

67% 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.

5 Use Ohm's Law to calculate the value of current in this circuit if voltage is 75 volts and resistance is 10 Ω.
80% Answer Correctly
7.5 A
6.75 A
15 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 = \( \frac{V}{R} \) = \( \frac{75}{10} \) = 7.5 A