The deflection for 50 division of galvanometer is decreased to 25 divisions by shunt resistance of 12Ω. Galvanometer resistance is_____________?
Correct answer: D. 12Ω
- A. 18Ω
- B. 30Ω
- C. 24Ω
- D. 12Ω
Explanation
The deflection falls from 50 divisions to 25 divisions, so the galvanometer current becomes half its original value. With a shunt of 12 Ω, equal current division requires the galvanometer resistance to equal the shunt resistance: G = 12 Ω. The likely wrong choice is a, which can result from using the shunt relation incorrectly.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Steady Current
Steady current is the continuous flow of charge at a constant rate through a conductor. The topic covers current, charge, potential difference, resistance, Ohm's law, resistivity and electrical power, along with series and parallel circuits, while distinguishing conventional current direction from electron motion.
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 Steady Current questions
An ammeter measures the total current flowing through a circuit when it is connected__________________?
Galvanometer is a very sensitive device with______________________?
A moving coil galvanometer of resistance 100? gives half scale deflection for a current of 20mA. What will be the potential difference across it ?
A galvanometer basically is an instrument used to ____________________?
A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is__________________?
In a multi range ammeter as the range increases _____________________?