12. A 9V battery maintains a current of 3 A through a radio. What is the resistance in the circuit? 13. Describe the function of a diode in your own words.
Answer (1)
Let's go through each part of your question:
Finding the Resistance in the Circuit:
To find the resistance in a circuit, we can use Ohm's Law, which states:
V = I × R
Where:
V is the voltage in volts (V)
I is the current in amperes (A)
R is the resistance in ohms ( Ω )
Given:
V = 9 V
I = 3 A
We need to find R . Rearranging the formula, we get:
R = I V
Substituting the given values:
R = 3 A 9 V = 3Ω
So, the resistance in the circuit is 3Ω .
Function of a Diode:
A diode is an electronic component that allows current to flow in only one direction. It has two terminals, called the anode and the cathode. The key functions of a diode include:
Rectification : Diodes are used in converting AC (alternating current) to DC (direct current). This process is known as rectification.
Blocking Reverse Current : Diodes prevent current from flowing in the reverse direction, which can protect circuits from damage.
Signal Demodulation : Diodes help in demodulating radio signals, allowing the extraction of audio from an AM radio signal.
Overall, the diode is a critical component in many electrical and electronic systems due to its directionality properties and its ability to control the flow of current.
