JEE Main 2019 — Physics solution

JEE Main2019Physics

To verify Ohm’s law, a student connects the voltmeter across the battery as, shown in the figure. The measured voltage is plotted as a function of the current, and the following graph is obtained :

If V₀ is almost zero, identify the correct statement :

A
The emf of the battery is 1.5 V and its internal resistance is 1.5 $Ω$
B
The emf of the battery is 1.5 V and the value of R is 1.5 $Ω$
C
The value of the resitance R is 1.5 $Ω$
D
The potential difference across the battery is 1.5 V when it sends a current of 1000 mA

Solution

$V = \frac{E R}{R + r} f or R = \infty, V = E = 1.5 V f or R = 0, l = E / r = 1 r = 1.5 Ω$

← Back to full paper

Practice more Physics

Concept-wise practice with instant solutions on Fundamenthol.

Start practicing →