A circuit is given with R=200Ω, Voltage = 3V, what will be the current?
Solution and Explanation
To calculate the current in an electric circuit, you can use Ohm's Law, which is a fundamental principle in electrical engineering. It states that the current flowing through a conductor between two points is directly proportional to the voltage applied across the two points and inversely proportional to the resistance of the conductor.
The formula for Ohm's Law is given by:
\( I = \frac{V}{R} \)
Where:
- I is the current in amperes (A)
- V is the voltage in volts (V)
- R is the resistance in ohms (Ω)
Using the given values: R = 200 Ω and V = 3 V, we can substitute into the formula to find the current:
\( I = \frac{3V}{200\, \Omega} = 0.015 mA \) or 15 mA (milliamperes)
Therefore, the current flowing in the circuit is 0.015 amperes or 15 milliamperes. This amount of current is typical for low-power electronic circuits, such as those in basic sensors, LEDs, or microcontroller-based systems.
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Concepts Used:
Current Electricity
Current electricity is defined as the flow of electrons from one section of the circuit to another.
Types of Current Electricity
There are two types of current electricity as follows:
Direct Current
The current electricity whose direction remains the same is known as direct current. Direct current is defined by the constant flow of electrons from a region of high electron density to a region of low electron density. DC is used in many household appliances and applications that involve a battery.
Alternating Current
The current electricity that is bidirectional and keeps changing the direction of the charge flow is known as alternating current. The bi-directionality is caused by a sinusoidally varying current and voltage that reverses directions, creating a periodic back-and-forth motion for the current. The electrical outlets at our homes and industries are supplied with alternating current.