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Physics Class 10 Practical 30 Important Viva Questions with Answers (To study resistors in parallel circuit)
Viva Questions and Answers
Q1: What is a parallel circuit?
A: A parallel circuit is one where components are connected across common points, providing multiple paths for current to flow.
Q2: How does the total resistance in a parallel circuit compare to the individual resistances?
A: The total resistance in a parallel circuit is always less than the smallest individual resistance.
Q3: How do you calculate the total resistance in a parallel circuit?
A: The total resistance Rt is calculated using the formula:
Q 4: What happens to the current in a parallel circuit?
A: The total current is the sum of the currents through each parallel branch.
Q5 : How does voltage behave in a parallel circuit?
A: The voltage across each component in a parallel circuit is the same.
Q6 : Why is it important to study resistors in parallel circuits?
A: Studying resistors in parallel circuits helps understand how electrical devices share power and how the total resistance affects the circuit's overall performance.
Q7: If one resistor fails in a parallel circuit, what happens to the circuit?
A: If one resistor fails (opens), the other paths remain functional, and current can still flow through the remaining branches.
Q8: What is the advantage of using resistors in parallel?
A: Using resistors in parallel allows for more consistent voltage distribution and greater reliability, as failure in one branch doesn’t affect the entire circuit.
Q9: How would you experimentally verify the total resistance in a parallel circuit?
A: You can measure the total current and voltage, then calculate the total resistance using Ohm’s law:
Rt=V/I
Q10: Can resistors in a parallel circuit have different values?
A: Yes, resistors in a parallel circuit can have different values, and the total resistance will be determined by their combined effect
