Chapter 22, Problem 90A

To determine

To identify: Whether the ammeter have same reading for given circuit or not.

Answer to Problem 90A

Yes, the ammeter reading will be the same.

Explanation of Solution

Given:

The given circuit is shown below.

  

Formula Used:

Ohm’s law is given as,

  $V=IR$

Where, $V$ voltage, $I$ is current and $R$ is resistance.

Calculation:

For initial circuit,

  $V=6\text{V}\text{and }R=30\Omega$

So reading of ammeter is

  $I=\frac{V}{R}=\frac{6}{30}=0.2\text{A}$

If the ammeter is moved to the bottom of the circuit as shown below,

  

Here also reading of ammeter is

  $I=\frac{V}{R}=\frac{6}{30}=0.2\text{A}$

Since, the current is same everywhere in the circuit. So, the ammeter reading will be same irrespective of the ammeter position.

Conclusion:

Therefore, if the ammeter in initial circuit is moved the bottom of the circuit, the ammeter reading will not change.