If four different resistors are used to pass electric current for different time durations, then which of the following will produce the largest heating effect in joules?
Correct answer: D. When 3 A current is passed through a 1-ohm resistor for 1 sec
- A. When 1 A current is passed through a 3 ohm resistor for 2 sec
- B. When 1 A current is passed through a 2 ohm resistor for 3 sec
- C. When 2 A current is passed through a 1-ohm resistor for 2 sec
- D. When 3 A current is passed through a 1-ohm resistor for 1 sec
Explanation
To determine the largest heating effect in joules, we need to calculate the heat produced in each scenario using the formula: Heat (H) = I^2 * R * t, where I is the current in amperes, R is the resistance in ohms, and t is the time in seconds.d. When 3 amp current is passed through 1-ohm resistor for 1 sec.H = (3^2) * 1 * 1 = 9 joulesComparing the results, we can see that option D produces the largest heating effect with 9 joules.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Current Electricity
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
Practise Current Electricity
1,052 free Current Electricity MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Current Electricity questions
If a wire is molded in the form of a ring of radius r which encloses a charge q, then the strength of the electric field at the center of the ring will be:
Which of the following statements is correct for the given diagram?
In the given figure of a resistor, the value of carbon resistance is:
A 50 Ampere-hour battery can supply a current of 50 A for 1 hour, 25 A for 2 hour, and so on. Then the total energy stored in the 12V-50 Ampere-hour battery is:
The resistance of a cell is 4.2 ohm at 100° C and the temperature coefficient of resistance of its material is 0.004/∘C. Its resistance at 0∘C is:
SI unit of resistivity is: