Electric Potential and Capacitance | Physics JEE previous year questions with Solutions

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Q 11 :

The electric potential at the centre of two concentric half rings of radii $R_{1}$ and $R_{2}$ , having same linear charge density $λ$ is

$\frac{2 λ}{ε_{0}}$
$\frac{λ}{2 ε_{0}}$
$\frac{λ}{4 ε_{0}}$
$\frac{λ}{ε_{0}}$

(2)

$d v = \frac{1}{4 π ε_{0}} \frac{λ d ℓ}{R}; v \int d v = \frac{1}{4 π ε_{0}} \frac{λ ℓ}{R}$

$Potential at centre, V = V_{2} + V_{1}$

$\Rightarrow V = \frac{(λ . π R_{2})}{4 π ε_{0} R_{2}} + \frac{(λ . π R_{1})}{4 π ε_{0} R_{1}} = \frac{λ}{2 ε_{0}}$

Q 12 :

Figure shows part of a circuit. What is the potential difference $V_{C} - V_{B} =$ __________ $V$

(20)

Applying Kirchhoff's Junction Law at E current in wire DE is 8A from D to E. Now further applying Junction Law at D. The current in $3 Ω$ resistance will be 3A towards D.

Topic Question Set

Q 11 :

The electric potential at the centre of two concentric half rings of radii $R_{1}$ and $R_{2}$ , having same linear charge density $λ$ is

Q 12 :

Figure shows part of a circuit. What is the potential difference $V_{C} - V_{B} =$ __________ $V$

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Topic Question Set

Q 11 : The electric potential at the centre of two concentric half rings of radii R1 and R2, having same linear charge density λ is

Q 12 : Figure shows part of a circuit. What is the potential difference VC-VB= __________ V

Want Us to Email you About Special Offers & Updates?

Q 11 :

The electric potential at the centre of two concentric half rings of radii $R_{1}$ and $R_{2}$ , having same linear charge density $λ$ is

Q 12 :

Figure shows part of a circuit. What is the potential difference $V_{C} - V_{B} =$ __________ $V$