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A metallic conductor of irregular cross-section is as shown in the figure. A constant potential difference is applied across the ends (1) and (2). Then :
            
  • a)
    The current at the cross-section P equals the current at the cross-section Q
  • b)
     The electric field intensity at P is less than that at Q.
  • c)
    The rate of heat generated per unit time at Q is greater than that at P
  • d)
     The number of electrons crossing per unit area of cross-section at P is less than that at Q
Correct answer is option 'A,B,C'. Can you explain this answer?
Verified Answer
A metallic conductor of irregular cross-section is as shown in the fig...
The answer provided in the forum is wrong,the correct answer would be option A,B,C,D.
Solution:
Current is constant across the cross-section.
E ∝1/A ;     r∝1/A
=>i2r∝1/A
∴heat at Q>heat a P.
∴A,B,C,D are correct.
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A metallic conductor of irregular cross-section is as shown in the figure. A constant potential difference is applied across the ends (1) and (2). Then : a)The current at the cross-section P equals the current at the cross-section Qb)The electric field intensity at P is less than that at Q.c)The rate of heat generated per unit time at Q is greater than that at Pd)The number of electrons crossing per unit area of cross-section at P is less than that at QCorrect answer is option 'A,B,C'. Can you explain this answer?
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