Question

calculate the current ampere through resistance of 30 across which a p.d of 4.5 v is applied it


A) 1
B) 0.15
C) 0.5
D) 12
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Answer 1

Given:-

• Resistance (R) = 30

• Potential Difference (V) = 4.5v

To Find:-

• Current (I)

Solution:-

By using this Formula

→ V = IR

Substitute the value we get

→ 4.5 = I ×30

→ 4.5/30 = I

→ l = 4.5/30

→ I = 0.15A

∴ The current is 0.15 ampere.

Hence Option (B) is the correct answer

Additional Concept !!

Potential Difference: The potential difference between two point in an electric circuit carrying some current as the work done to move a unit charge from one point to the other.

Potential difference = Work done /Charge.

→ V = W/Q

here

V is the potential difference

W is the work done

Q is the charge

✧ SI unit of electric potential energy is volt (V).

✧ 1 volt : The potential difference between two points in a current carrying conductor when one joule of work is done to move a charge of one coulomb from one point to other.

1 Volt = 1Joule/1Coulomb

Answer 2

Answer:

0.15A hence Option (B) is the answer.

Explanation:

=>Resistance (R) = 30

=>Potential Difference (V) = 4.5v

=> V = IR

Putting the value

=> 4.5 = I ×30

=> 4.5/30 = I

=> l = 4.5/30

=> I = 0.15A

The current is 0.15 ampere.