The circuit shown is used to control the brightness of two identical lamps. The variable resistor is adjusted until the lamps op
erate at their correct voltage of 3.0V 1) When the lamps operate at the correct voltage, the reading on the ammeter is 1.2A. Calculate the current in one lamp.
You don't have to worry about voltage drop or the value of the resistor to make that 9 volt drop to happen. The current is divided evenly by the two lamps. If the ammeter reads 1.2 amps before the current goes into the lamps then since this is a parallel circuit, the lamps will divide up the current evenly between them.
That's another way of saying each one will get 1.2 amps /2 = 0.6 amps.
If we have a net force F acting on a body of mass m it will experiment an acceleration a. Newton's 2nd Law gives us the relation between these quantities: F=ma.
In our case, we want to calculate the acceleration, so we write:
Photo voltaic cells covert sunlight to the electricity. It absorbs the light from the sun and use that sunlight to create electric current. The number of photo voltaic cells are connected together in a solar panel to generate enough electricity to power up a home.