Question

5. In a series circuit, if more electric devices are added, what happens to the current in the circuit when the battery voltage does not change? A. always decreases C. sometimes decreases B. always increases D. sometimes increases​

Answer 1

Answer:

a) always decrease

Explanation:

Current is inversely proportional to resistance.

if we are going to add more electric devices that we are going to add more resistance .

If we increase resistance then current will definitely decrease.

I is inversely proportional to R.

Answer 2

Given :   In a series circuit,  more electric devices are added,

To Find : what happens to the current in the circuit when the battery voltage does not change?

A. always decreases

B. always increases

C. sometimes decreases

D. sometimes increases​

Solution:

I = V/R

I = Current

V = Voltage

R = Resistance

if V is constant

Then  I  ∝ 1/R

No  electric device is Resistance Free

And resistance in series gets added

Hence when more electric devices are added the resistance of circuit increases

as I ∝ 1/R

Hence on increase of resistance , Current will Decrease

Hence always decreases is correct answer

Correct option is A) always decreases

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