Question

Explain the operation of the alarm system and strobe lighting system:

(i) By determining the resistance of the resistor in the alarm circuit and explaining the functionality of the resistor in the circuit;
(ii) By providing all circuit theory explanations and calculations to show that the voltage in the alarm system can be reduced to 5V since the system needs to operate with a current between 0.4mA to 0.6mA;
(iii) By providing all charge theory explanations and calculations to show the current flowing in the strobe lighting system.

Answer 1

The alarm system and strobe lighting system operate using electrical circuits. The resistor in the alarm circuit controls the current flow and the voltage in the system can be reduced using a voltage divider circuit. The current in the strobe lighting system can be determined using Ohm's law.

Step-by-step explanation:

The alarm system and strobe lighting system operate by using electrical circuits.

(i) The resistor in the alarm circuit controls the flow of current in the circuit. By determining the resistance of the resistor, you can calculate the current passing through it using Ohm's law. The resistor helps limit the current to prevent damage to the other components in the circuit.

(ii) To reduce the voltage in the alarm system to 5V, you can use a voltage divider circuit. By selecting appropriate resistors, you can divide the voltage in the circuit. Using the formula Vout = Vin * (R2 / (R1 + R2)), you can calculate the values of the resistors needed to achieve the desired voltage.

(iii) The current flowing in the strobe lighting system can be calculated using Ohm's law. By determining the resistance of the system and applying the voltage, you can find the current flowing through the system.