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NEETPhysicsCurrent Electricity

Current (i ) is flowing through a wire of nonuniform cross section as shown. Match the following two columns. ( array |c|l|c|l| & Column-I & & Column-II (a) & Current density & (p) & is more at 1 (b) & Electric field & (q) & is more at 2 (c) & Resistance per & (r) & is same at both & unit length & & sections 1 and 2 (d) & Potential difference & (s) & data insufficient & per unit length & & array )

Options

  1. Aa-p, b-p, c-p, d-p
  2. Ba-q, b-r, c-s, d-p
  3. Ca-q, b-q, c-p, d-p
  4. Da-p, b-q, c-r, d-s

Correct answer

D. a-p, b-q, c-r, d-s

Step-by-step solution

Let's break down the problem and match Column-I with Column-II: - (a) Current density: Current density (J= I A ), where (I ) is the current and (A ) is the cross-sectional area. In a wire with non-uniform cross section, the current density will be greater where the cross-sectional area is smaller. Therefore, the current density is more at section 1 if section 1 has a smaller cross-sectional area compared to section 2. - So, (a) matches (p). - (b) Electric field: The electric field (E ) in a conductor is related to

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