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In the figure shown ‘R’ is a fixed conducting ring of negligible resistance and radius ‘a’. PQ is a uniform rod of resistance r. It is hinged at the centre of the ring and rotated about this point in clockwise direction with a uniform angular velocity ω. There is a uniform magnetic field of strength ‘B’ pointing inwards. ‘r’ is a stationary resistance, then choose correct statements
  • a)
    Current through ‘r’ is zero. 
  • b)
    Current through ‘r’ is 
  • c)
    Direction of current in external ‘r’ is from centre to circumference
  • d)
    Direction of current in external ‘r’ is from circumference to centre
Correct answer is option 'B,D'. Can you explain this answer?
Verified Answer
In the figure shown ‘R’ is a fixed conducting ring of negl...
Equivalent circuit :
 (∵ Radius = a)
By nodal equation
 
5X = 4e

⇒ 
also direction of current in ‘r’ will be towards negative terminal i.e. from rim to origin
Alternately; by equivalent of cells (figure (ii)) :
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In the figure shown ‘R’ is a fixed conducting ring of negligible resistance and radius ‘a’. PQ is a uniform rod of resistance r. It is hinged at the centre of the ring and rotated about this point in clockwise direction with a uniform angular velocity ω. There is a uniform magnetic field of strength ‘B’ pointing inwards. ‘r’ is a stationary resistance, then choose correctstatementsa)Current through ‘r’ is zero.b)Current through ‘r’ isc)Direction of current in external ‘r’ is from centre to circumferenced)Direction of current in external ‘r’ is from circumference to centreCorrect answer is option 'B,D'. Can you explain this answer?
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In the figure shown ‘R’ is a fixed conducting ring of negligible resistance and radius ‘a’. PQ is a uniform rod of resistance r. It is hinged at the centre of the ring and rotated about this point in clockwise direction with a uniform angular velocity ω. There is a uniform magnetic field of strength ‘B’ pointing inwards. ‘r’ is a stationary resistance, then choose correctstatementsa)Current through ‘r’ is zero.b)Current through ‘r’ isc)Direction of current in external ‘r’ is from centre to circumferenced)Direction of current in external ‘r’ is from circumference to centreCorrect answer is option 'B,D'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In the figure shown ‘R’ is a fixed conducting ring of negligible resistance and radius ‘a’. PQ is a uniform rod of resistance r. It is hinged at the centre of the ring and rotated about this point in clockwise direction with a uniform angular velocity ω. There is a uniform magnetic field of strength ‘B’ pointing inwards. ‘r’ is a stationary resistance, then choose correctstatementsa)Current through ‘r’ is zero.b)Current through ‘r’ isc)Direction of current in external ‘r’ is from centre to circumferenced)Direction of current in external ‘r’ is from circumference to centreCorrect answer is option 'B,D'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the figure shown ‘R’ is a fixed conducting ring of negligible resistance and radius ‘a’. PQ is a uniform rod of resistance r. It is hinged at the centre of the ring and rotated about this point in clockwise direction with a uniform angular velocity ω. There is a uniform magnetic field of strength ‘B’ pointing inwards. ‘r’ is a stationary resistance, then choose correctstatementsa)Current through ‘r’ is zero.b)Current through ‘r’ isc)Direction of current in external ‘r’ is from centre to circumferenced)Direction of current in external ‘r’ is from circumference to centreCorrect answer is option 'B,D'. Can you explain this answer?.
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