GROL - General Radiotelephone Operator License Electrical Principles and Units Questions and Answers

Question 1

In a direct current (DC) circuit, what is the relationship between voltage, current, and resistance as described by Ohm's Law?

Accepted Answer

Voltage is directly proportional to the current and resistance.

Answer

Ohm's Law states that the voltage (E) across a conductor is directly proportional to the current (I) flowing through it, provided all physical conditions and temperatures remain the same. The constant of proportionality is the resistance (R). The formula is E = I * R.

Question 2

A technician measures a voltage of 24 volts across a resistor with a current of 2 amperes flowing through it. What is the resistance of the component?

Accepted Answer

12 ohms

Answer

According to Ohm's Law, Resistance (R) = Voltage (E) / Current (I). Given E = 24V and I = 2A, the calculation is R = 24V / 2A = 12 ohms.

Question 3

Which of the following is the standard unit of measurement for electrical power?

Accepted Answer

Watt

Answer

The standard unit for electrical power is the Watt (W). Power is the rate at which electrical energy is transferred by an electric circuit. It is calculated as Power (P) = Voltage (E) * Current (I).

Question 4

If three resistors of 10 ohms, 20 ohms, and 30 ohms are connected in a series circuit, what is the total resistance?

Accepted Answer

60 ohms

Answer

When resistors are connected in series, the total resistance is the sum of the individual resistances. Therefore, R_total = R1 + R2 + R3 = 10Ω + 20Ω + 30Ω = 60Ω.

Question 5

What is the total resistance of a circuit with two resistors, 100 ohms and 100 ohms, connected in parallel?

Accepted Answer

50 ohms

Answer

For resistors in parallel, the reciprocal of the total resistance is the sum of the reciprocals of the individual resistances (1/R_total = 1/R1 + 1/R2). For two equal resistors, the total resistance is half the value of one resistor. So, R_total = 100Ω / 2 = 50Ω.

(GROL) General Radiotelephone Operator License Practice Test

(GROL) General Radiotelephone Operator License Practice Test

GROL - General Radiotelephone Operator License Electrical Principles and Units Questions and Answers