Virtual Labs

Why is a relay used instead of directly connecting a DC motor to Raspberry Pi GPIO pins?

a: Relays make the motor run faster Explanation

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b: GPIO pins cannot supply enough current to run the motor directly Explanation

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c: Relays reduce the voltage requirement for motors Explanation

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d: Relays convert AC to DC power Explanation

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What type of signal is typically sent from the Raspberry Pi to control a relay module?

a: High-voltage AC signal Explanation

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b: Low-voltage digital signal Explanation

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c: PWM analog signal Explanation

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d: Serial communication signal Explanation

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In motor control applications, what is the role of the flyback diode in the relay circuit?

a: Prevents reverse current from damaging components Explanation

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b: Increases relay switching speed Explanation

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c: Supplies additional voltage to the motor Explanation

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d: Converts AC to DC Explanation

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Which of the following is an advantage of using a relay module with a DC motor?

a: Allows isolation between control and power circuits Explanation

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b: Increases the GPIO pin voltage Explanation

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c: Reduces motor speed automatically Explanation

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d: Provides continuous power without switching Explanation

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If a 5V relay module is connected to a Raspberry Pi, which GPIO state usually activates the relay?

a: Logic HIGH (3.3V) Explanation

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b: Logic LOW (0V) Explanation

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c: PWM at 50% duty cycle Explanation

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d: Alternating HIGH and LOW Explanation

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What happens if a DC motor is connected without a proper relay or driver circuit?

a: Motor will run normally Explanation

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b: Motor may overheat but Raspberry Pi will be safe Explanation

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c: Raspberry Pi GPIO pins may get damaged due to high current Explanation

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d: The relay will fail to switch Explanation

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Raspberry Pi Motor Control with Relay