Find the potential difference (in V) across a resistance of 2.5 kΩ through which a 2 mA current flows.
5
Concept:
- Ohm's law: It states that at constant temperature and other physical quantities, the potential difference across a conductor is directly proportional to the current flowing through it.
Therefore V = I R
where V is the potential difference, I is the electric current and R is the resistance
Calculation:
Given:
Resistance (R) = 2.5 kΩ = 2500 Ω
Current (I) = 2 mA = 0.002 A
V = IR
V = 2500 × 0.002
V = 5.0
Potential difference = 5V
Similar Questions
Fill in the blank with the most appropriate option.
18 volts = _________ × 3 ohms.
- ______ states that the electric current flowing through a metallic wire is directly proportional to the potential difference ‘V’ across its ends provided its temperature remains the same.
- _____ states that the electric current flowing through a metallic wire is directly proportional to the potential difference 'V' across its ends provided its temperature remains the same.
According to Ohm's Law, which of the following is true?
According to Ohm's Law, how is current related to voltage and resistance?
- For a given potential difference (V), current (I) and resistance (R) across a conductor, Ohm's law is represented as:
A source of voltage V maintains a current I in a circuit. The power (P) input to the circuit by the source is given by:
According to Ohm’s law, if current (I) increases and potential difference (V) remains constant, then:
Important Questions from Ohm’s Law
Three resistors having resistances in the ratio 1 : 2 : 3 are in parallel. The current through the resistors are in the ratio
Which of the law states that in any closed circuit the current is directly proportional to the voltage, provided the physical conditions of the circuit are kept constant?
Fill in the blank with the most appropriate option.
18 volts = _________ × 3 ohms.
- ______ states that the electric current flowing through a metallic wire is directly proportional to the potential difference ‘V’ across its ends provided its temperature remains the same.
- _____ states that the electric current flowing through a metallic wire is directly proportional to the potential difference 'V' across its ends provided its temperature remains the same.
