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A metallic ring of mass m  and radius r with a uniform metallic spoke of same mass m and length r is rotated about its axis with angular velocity ω in a perpendicular uniform magnetic field B as shown. If the central end of the spoke is connected to the rim of the wheel through a resistor R as shown. The resistor does not rotate, its one end is always at the center of the ring and other end is always in contact with the ring. A force F as shown is needed to maintain constant angular velocity of the wheel. F is equal to (The ring and the spoke has zero resistance)
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A metallic ring of massm and radiusrwith a uniform metallic spoke of s...
Fb = BIL

To maintain constant angular velocity :
F(r) = FB(r/2)
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Most Upvoted Answer
A metallic ring of massm and radiusrwith a uniform metallic spoke of s...
Fb = BIL

To maintain constant angular velocity :
F(r) = FB(r/2)
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A metallic ring of massm and radiusrwith a uniform metallic spoke of same massmand lengthris rotated about its axis with angular velocityωin a perpendicular uniform magnetic fieldBas shown. If the central end of the spoke is connected to the rim of the wheel through a resistorRas shown. The resistor does not rotate, its one end is always at the center of the ring and other end is always in contact with the ring. A forceFas shown is needed to maintain constant angular velocity of the wheel.Fis equal to (The ring and the spoke has zero resistance)a)b)c)d)Correct answer is option 'B'. Can you explain this answer?
Question Description
A metallic ring of massm and radiusrwith a uniform metallic spoke of same massmand lengthris rotated about its axis with angular velocityωin a perpendicular uniform magnetic fieldBas shown. If the central end of the spoke is connected to the rim of the wheel through a resistorRas shown. The resistor does not rotate, its one end is always at the center of the ring and other end is always in contact with the ring. A forceFas shown is needed to maintain constant angular velocity of the wheel.Fis equal to (The ring and the spoke has zero resistance)a)b)c)d)Correct answer is option 'B'. Can you explain this answer? for Physics 2024 is part of Physics preparation. The Question and answers have been prepared according to the Physics exam syllabus. Information about A metallic ring of massm and radiusrwith a uniform metallic spoke of same massmand lengthris rotated about its axis with angular velocityωin a perpendicular uniform magnetic fieldBas shown. If the central end of the spoke is connected to the rim of the wheel through a resistorRas shown. The resistor does not rotate, its one end is always at the center of the ring and other end is always in contact with the ring. A forceFas shown is needed to maintain constant angular velocity of the wheel.Fis equal to (The ring and the spoke has zero resistance)a)b)c)d)Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Physics 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A metallic ring of massm and radiusrwith a uniform metallic spoke of same massmand lengthris rotated about its axis with angular velocityωin a perpendicular uniform magnetic fieldBas shown. If the central end of the spoke is connected to the rim of the wheel through a resistorRas shown. The resistor does not rotate, its one end is always at the center of the ring and other end is always in contact with the ring. A forceFas shown is needed to maintain constant angular velocity of the wheel.Fis equal to (The ring and the spoke has zero resistance)a)b)c)d)Correct answer is option 'B'. Can you explain this answer?.
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