Q. Resistors of resistance 20$\Omega$ and 30$\Omega$ are joined in series with a battery of emf 3V. It is desired to measure current and voltage across the 20$\Omega$ resistor with the help of an ammeter and voltmeter. Identify the correct arrangement of ammeter ($A$) and voltmeter ($V$) out of four possible arrangements shown in figure. Given below
A)
B)
C)
D)
Explanation
(c) As ammeter must be connected in series of $20\Omega$ resistor, and the voltmeter in parallel to $20\Omega$ resistor, the correct arrangement is as shown in figure(c).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.