A 0-1A ammeter having a resistance of 50Ω is used to measure the current flowing in a 1kΩ resistor when the supply voltage is 250V. Calculate: (a) the approximate value of current (neglecting the ammeter resistance), (b) the actual current in the circuit, (c) the power dissipated in the meter, (d) the power dissipated in 1kΩ resistor.
Ohm's law
Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
Path of Least Resistance
In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
- A 0-1A ammeter having a resistance of 50Ω is used to measure the current flowing in a 1kΩ resistor when the supply voltage is 250V. Calculate:
(a) the approximate value of current (neglecting the ammeter resistance), (b) the actual current in the circuit, (c) the power dissipated in the meter, (d) the power dissipated in 1kΩ resistor.
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