Question

Two bulb B1 and B2 are exactly identical. When the key is pressed the readingof the ammeter will a)remain unchanged b)be doubled c) be halved d) become four times​

Answer 1

Two bulb B1 and B2 are exactly identical, When the key is pressed the readingof the ammeter will be doubled.

Option - B

Explanation:

• Identical bulbs are present in this case in a circuit and when the switch is closed the circuit becomes complete. So the current will start to flow.
• The circuit has an ammeter but when the circuit is complete and current starts showing the reading of the ammeter will be doubled.

• Because when a series circuit is considered then in the circuit across all the elements in the circuit will be doubled.

To know:

Two bulbs b1 b2 of equal capacity contain 10 gm O2 &O3 respectively . Which bulb will have greater no. Of atoms &which will have greater no. of molecule more:

https://brainly.in/question/4966715

Answer 2

Explanation:

Answer is doubled

The required terms to be remembered is

1. ohms law and

2.resistance in parallel formula