Find the current through the 30 Ω resistor in the circuit shown.
Correct answer: D. 5/6 Ampere
- A. 2/6 Ampere
- B. 3/6 Ampere
- C. 4/6 Ampere
- D. 5/6 Ampere
Explanation
To find the current through the 30 Ω resistor, you need to determine the potential difference across it. The given potentials are 10 V and -15 V. Thus, the potential difference is 10 - (-15) = 25 volts. Applying Ohm's Law, I = V/R, where V is the potential difference and R is the resistance (30 Ω), we find the current I = 25/30 = 5/6 A. Therefore, the correct answer is 5/6 Ampere.The other options (2/6, 3/6, and 4/6 Ampere) do not result from the correct calculation using the given potential difference, indicating errors in those potential difference values or arithmetic operations.
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
In the given circuit R1 > R2 . Find which of the following statements is correct.
A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is true?
Two electric bulbs one of 200 volt, 40 watt and the other 200 volt, 100 watt are connected in a house wiring circuit.
In this question, a statement is given followed by two courses of action numbered I and II. It is required to grasp the statement, analyze the problem or policy it mentions and then decide which of the courses of action logically follow / most appropriate.Statement:Mr. X, an active member of the Union, often insults his superiors in the office with his rude behavior.Courses of action:I) He should be transferred to some other department.II) The matter should be referred to the Union.
At what temperature will the resistance of a copper wire become three times its value at 0oC (Temperature coefficient of resistance for copper = 4 × 10?3 per oC)