Question

Seven resistances, each of value $20\Omega$ , are connected to a $2V$ battery as shown in the figure. The ammeter reading will be

• A. 1/10 A
• B. 3/10 A
• C. 4/10 A
• D. 7/10 A

Answer 1

Answer: (C)

In the question seven resistors, each of resistance $20\Omega$ are connected in parallel to battery.
Current through each resistor $=\frac{2}{20}=\frac{1}{10}A$
Current through ammeter $=4\times \frac{1}{10}=\frac{4}{10}A$.