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FAQs on Textbook: Circuits and Potential difference - Technical Science for Grade 10

$1. What is the difference between current and voltage in a circuit?
Ans.Current refers to the flow of electric charge through a circuit, measured in amperes (A), while voltage, or potential difference, is the measure of electric potential energy per unit charge, measured in volts (V). Voltage is what drives the current through the circuit.
$2. How do you calculate the total resistance in a series circuit?
Ans.In a series circuit, the total resistance can be calculated by simply adding the resistance values of each component together. The formula is R_total = R1 + R2 + R3 + ..., where R1, R2, and R3 are the resistances of each component in the circuit.
$3. What is Ohm's Law and how is it applied in circuits?
Ans.Ohm's Law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. It is expressed as V = I × R, where V is voltage, I is current, and R is resistance. This law helps in calculating the current or voltage in a circuit when the other values are known.
$4. Why is it important to understand circuits and potential difference in everyday life?
Ans.Understanding circuits and potential difference is essential because it helps us comprehend how electrical devices work, how to troubleshoot electrical problems, and the safety measures needed when working with electricity. It also aids in making informed decisions about energy consumption and efficiency.
$5. What are some common applications of potential difference in electronic devices?
Ans.Potential difference is used in various electronic devices, including batteries, where it provides the energy needed for operation, in power supplies to ensure devices receive the correct voltage, and in sensors that rely on voltage changes to detect environmental factors. Understanding potential difference is crucial for designing and using these devices effectively.
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