In the given figure, a battery of emf E is connected across a conductor P Q of length l and different area of cross-sections having radii r 1 and r 2 r 2 < r 1 . Choose the correct option as one moves from P to Q .

Question

In the given figure, a battery of emf E is connected across a conductor P Q of length l and different area of cross-sections having radii r 1 and r 2 r 2 &#60; r 1 . Choose the correct option as one moves from P to Q .

Aicharya · Accepted Answer

Current is constant in conductor i = constant Resistance of element d R = &#961; d x &#960; r 2 d V = i d R = &#160;ipdx&#160; &#960; r 2 E = d V d x = i &#961; &#960; r 2 and V d = e E &#964; m &#8756; &#160; V d &#215; E &#8594; E &#8733; 1 r 2 If r decreases, E will increase. &#8756; &#160; V d will increase.

In the given figure, a battery of emf E is connected across a conductor P Q of length l and different area…

Solution