Arduino Junior Certification Practice Questions 3

Which is not present in a working electric motor?

• permanent magnet

• AC current

• coiled wire

• DC current

How many void loop( ) functions can you include in a sketch

• As many as you declare in the void setup( ) function.

• two

• As many as you want.

• one

What is a common use of a for( ) statement?

• To repeat a section of code continuously.

• To repeat a section of code as long as a specified condition is true.

• To repeat a section of code a specified number of times.

• To repeat a section of code one time.

On a multimeter, which setting would be appropriate to measure the voltage of a 9-volt battery?

• Setting C

• Setting D

• Setting B

• Setting A

An LED is connected to Pin 9 and a potentiometer is connected to Pin A0. What does the following sketch do?

• It flashes the LED at a rate based on the value of the potentiometer.

• It fades the brightness of the LED based on the value of the potentiometer.

• It sets the value of the potentiometer based on whether the LED is on or off.

• It changes the color of the LED based on the value of the potentiometer.

An electrical component that stores an electric charge.

• resistor

• potentiometer

• capacitor

• phototransistor

The electrode or wire through which current exits a device, such as an LED, where the current can flow in only one direction.

• anode

• diode

• ode

• cathode

The electrode or wire through which current enters a device, such as an LED, where current can flow only in one direction.

• anode

• diode

• ode

• cathode

An electronics device component that converts light energy into electrical energy.

• photoresistor

• photon converter

• phototransistor

• photograph

An electrical device that has variable resistance; often used to control the voltage in a circuit.

• Push Button

• Slide Switch

• Potentiometer

• Limit Switch