COMEDK · Physics · 21. Magnetic Effects of Current
The wire made of Phosphor bronze is used as the suspension strip in the moving coil galvanometer, because:
- A Its restoring torque per unit twist is very large
- B It has less tensile strength
- C It is more flexible
- D Its restoring torque per unit twist is small.
Answer & Solution
Correct Answer
(D) Its restoring torque per unit twist is small.
Step-by-step Solution
Detailed explanation
The moving coil galvanometer operates on the principle of balancing the magnetic deflecting torque with the restoring torque of the suspension strip. The deflecting torque is given by \(\tau_{d} = NIAB \sin \theta\), where \(N\) is the number of turns, \(I\) is the current,…
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