Question

20 volt of potential difference across a conduceter maintance a current of 0.2 Ampere. how much potential difference will be required to maintain a current of 250 mA in the same conducter ​

Answer 1

Answer:

i dont know then how can i tell

Explanation:

Answer 2

Given data :

• Potential difference, V = 20 v
• Current, I = 0.2 A
• Resistance, R = ?

Solution : Firstly we have to find out, resistance R.

Now, a/c to ohm's law

• V = IR

⟹ Potential difference = current * resistance

⟹ V = I * R

⟹ 20 = 0.2 * R

⟹ R = 20/0.2

⟹ R = 100 ohm

Now, a/c to question, to find out the required potential difference to maintain a current of 250 mA in the same conductor.

• 1 A = 1000 mA

Hence, current, I = 250 mA = 250/1000 A = 0.25 A

Here, resistance R is 100 ohm {due to same conductor}

Now, a/c to ohm's law,

⟹ Potential difference = current * resistance

⟹ V = 0.25 * 100

⟹ V = 25 v

Answer : Hence, to make of current 250 mA flow through the same resistor of 100 ohms a potential difference of 25 v is applied.

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