When a battery of 9 V is connected across a conductor and the current flowing is 0.1 A, the resistance is:(a) 90 W (b) 0.9 W (c) 9 W (d) 900 W
Question
When a battery of 9 V is connected across a conductor and the current flowing is 0.1 A, the resistance is:
(a) 90 W
(b) 0.9 W
(c) 9 W
(d) 900 W
Solution
To find the resistance, we can use Ohm's Law, which states that the voltage across a conductor is equal to the current through it times its resistance. This can be written as:
V = I * R
Where: V = Voltage (in volts) I = Current (in amperes) R = Resistance (in ohms)
We can rearrange this equation to solve for resistance:
R = V / I
Substituting the given values:
R = 9 V / 0.1 A = 90 ohms
So, the correct answer is (a) 90 ohms. Please note that the unit of resistance is ohms (Ω), not watts (W). Watts is the unit of power.
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