Grade9-Review

Hamdan works as an electrical engineer. He created a pictorial circuit diagram. Look at the below diagram that represents the electrical circuit and answer the questions.

Which arrow represents the conventional current flow?

• arrow 1

• arrow 2

The LED  ( 4 )  consumes the electrical power and transfers it to a different form of energy. By doing so, this component is known as a ________________. 

• load

• Path

• switch

• voltage

Which schematic symbol represents the resistor  ( 3 )  ?

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• 
• 

Which unit is used to measure the current in the circuit above? 

• ohm

• volt

• ampere

• watt

Which unit is used to measure the resistance in the circuit above?

• ohm

• Volt

• ampere

• watt

Zayed wants to test Hamdan's electrical circuit in Part A. He used the digital multimeter (DMM) to test Hamdan’s electrical circuit. Answer the below questions carefully.

Zayed connected the DMM cables as shown in the image to the right, he tested the voltage across the resistor. What is the DMM function that he used? 

• ammeter

• voltmeter

• ohmmeter

• wattmeter

Zayed connected the DMM cables as shown in the image to the right, he tested the current passing through the circuit. What is the DMM function that he used?

• ammeter

• voltmeter

• ohmmeter

• wattmeter

Zayed connected the DMM cables as shown in the image to the right, he switched off the push button to measure the resistance. What is the DMM function that he used? 

• ammeter

• voltmeter

• ohmmeter

• wattmeter

Which distance represents the diameter of the circle to the right?

• The distance from center to point c

• The distance from point c to point b

• The distance from point a to point c

• The distance from point a to point b

Which of the following angles represents an obtuse angle?

• 
• 
•