Daily Review
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3 Questions
Question 1 of 3
What is the primary purpose of earthing in an electrical installation?
Earthing provides a safe path for fault currents, protecting equipment and personnel by quickly tripping circuit breakers or blowing fuses.
Question 2 of 3
Which of the following is a common application of ultrasonic sensors?
Ultrasonic sensors emit sound waves and measure the time it takes for them to return, allowing for distance measurement.
Question 3 of 3
What happens to the current in a circuit if the resistance increases (assuming voltage remains constant)?
According to Ohm's Law (V=IR), current is inversely proportional to resistance when voltage is constant. Therefore, an increase in resistance leads to a decrease in current.
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