Electrical Circuit Assembly Quiz

1. 1.What is the purpose of the procedure above?

• To measure electrical current using a multimeter.

• To use a multimeter to measure electrical voltage.

• To connect cables to the power source.

• To set the multimeter for resistance measurement.

Answer explanation

The procedure is designed to use a multimeter specifically for measuring electrical voltage, as indicated by the correct answer choice. This involves setting the multimeter to the appropriate voltage measurement setting.

2.What is the goal of this procedure?

• To connect the multimeter to the power source.

• To measure electrical voltage using a multimeter.

• To set the multimeter to current measurement mode.

• To use the battery to power the tool.

Answer explanation

The goal of the procedure is to measure electrical voltage using a multimeter, which is essential for assessing the power supply's performance and ensuring proper functionality.

3.Why do we use a multimeter in this procedure?

• To measure the existing electrical voltage.

• To measure the electrical current in the circuit.

• To connect cables to the power supply.

• To power the battery more efficiently.

Answer explanation

We use a multimeter to measure the existing electrical voltage, which helps us understand the voltage levels in the circuit and ensure they are within the desired range.

4.What is the expected outcome of this procedure?

• To find the resistance in the circuit.

• To measure the electrical voltage present in the battery.

• To determine the electrical current in the circuit.

• To calculate the power used.

Answer explanation

The correct choice is to measure the electrical voltage present in the battery, as this procedure specifically focuses on assessing the voltage level, which is crucial for understanding battery performance.

5.The first step in assembling this circuit is...

• Connecting the 10kΩ resistor to the transistor base rail.

• Connecting a jumper wire to the positive power source.

• Preparing all the necessary materials.

• Placing the LDR on the breadboard.

Answer explanation

Preparing all the necessary materials is essential before starting any circuit assembly. It ensures you have everything needed, making the assembly process smoother and more efficient.

6.What should be done after placing the LDR on the breadboard?

• Connect the LDR to the transistor base.

• Connect the jumper wire to the power source.

• Place the LED on the breadboard.

• Connect the transistor's collector to the positive rail of the LED.

Answer explanation

After placing the LDR on the breadboard, the next step is to connect it to the transistor base. This is crucial for the LDR to control the transistor's operation based on light levels.

7.After connecting one leg of the LDR to the positive rail of the breadboard, the next step is...

• Place the 10kΩ resistor between the transistor base rail and the positive rail of the breadboard.

• Connect the other leg of the LDR to the transistor base.

• Connect the transistor's collector to the positive terminal of the LED.

• Place the LED on the breadboard.

Answer explanation

Placing the 10kΩ resistor between the transistor base rail and the positive rail is essential for limiting current to the transistor base, ensuring proper operation of the circuit before connecting the LDR's other leg.

8.The final step in this procedure is...

• Connecting a jumper wire from the negative rail of the breadboard to the negative power source.

• Connecting the transistor's emitter leg to the negative rail of the breadboard.

• Connecting a jumper wire from the positive rail of the breadboard to the positive power source.

• Testing the circuit by changing the light input to the LDR.

Answer explanation

The final step is to test the circuit by changing the light input to the LDR, as this verifies the functionality of the circuit and ensures it responds correctly to varying light conditions.

9.What should be done after preparing all the necessary materials?

• Connect the water pump to the relay terminal.

• Place the soil moisture sensor on the breadboard.

• Place the LED on the breadboard.

• Connect the power source to the breadboard.

Answer explanation

After preparing all necessary materials, the next step is to place the soil moisture sensor on the breadboard. This is crucial for setting up the circuit to monitor soil moisture levels effectively.

10.After placing the soil moisture sensor on the breadboard, the next step is...

• Connect the soil moisture sensor to the base of the NPN transistor.

• Connect the collector of the transistor to the positive terminal of the relay.

• Connect the jumper wires to the power source.

• Place the resistor between the base of the transistor and the positive rail of the breadboard.

Answer explanation

Connecting the soil moisture sensor to the base of the NPN transistor is essential as it allows the sensor to control the transistor, enabling the relay to activate based on moisture levels.