Question

An electric circuit has a 30V battery and a resistor of 90 ohm. Then the current in
the circuit will be

Answer 1

Answer

Current in the circuit is 0.34 A

Given

An electric circuit has a 30 V battery and a resistor of 90 ohm

To Find

Current in the circuit

Point's to remember

Ohm's Law

Potential difference is equals to the product of current and resistance

⇒ V = IR

SI unit of Potential difference is Volt

SI unit of current is Ampere

SI unit of Resistance is Ω

Solution

Potential difference , V = 30 V

Resistance , R = 90 Ω

Current , I = ? A

Apply formula ,

⇒ V = IR

⇒ 30 = I(90)

⇒ I = 3/9

⇒ I = 0.34 A

So , Current in the circuit is 0.34 A

Answer 2

Given ,

Potential difference (v) = 30 volt

Resistance (r) = 90 ohm

We know that , the relationship between potential difference and current is given by

$\boxed{ \sf{</p><p>V = IR}}$

Thus ,

30 = I × 90

I = 30/90

I = 1/3

I = 0.33 amp

Therefore ,

The current in the circuit will be 0.33 amp