(a) What is meant by the "resistance of a conductor" ? Write the relation between resistance, potential difference and current.
(b) When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Calculate the value of the resistance of the resistor.

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Solution

(a) Resistance is the property of a conductor to resist the flow of charge through it. The relation between resistance, current and potential difference is V = IR.
(b) Voltage, V = 12 V
Resistance, R = ?
Current, I = 2.5 $\times 10^{- 3}$ A
V = IR
R = V/I
R = 12/2.5 $\times 10^{- 3}$
R = 4800 Ώ

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When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

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(a) What is meant by the "resistance of a conductor" ? Write the relation between resistance, potential difference and current. (b) When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Calculate the value of the resistance of the resistor.

(a) Resistance is the property of a conductor to resist the flow of charge through it. The relation between resistance, current and potential difference is V = IR. (b) Voltage, V = 12 V Resistance, R = ? Current, I = 2.5 × 10-3 A V = IR R = V/I R = 12/2.5 × 10-3 R = 4800 Ώ

(a) What is meant by the "resistance of a conductor" ? Write the relation between resistance, potential difference and current.
(b) When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Calculate the value of the resistance of the resistor.

(a) Resistance is the property of a conductor to resist the flow of charge through it. The relation between resistance, current and potential difference is V = IR.
(b) Voltage, V = 12 V
Resistance, R = ?
Current, I = 2.5 $\times 10^{- 3}$ A
V = IR
R = V/I
R = 12/2.5 $\times 10^{- 3}$
R = 4800 Ώ