You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 1/2 A of current through the light bulb and 5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 2.5 W. Assuming any resistors that you need, design and build a circuit that delivers the required current and voltage to the bulb.

Question

You are in the lab with a 10 V battery.  You have a 10 W light bulb  and you want to put 1/2 A of current through the light bulb and 5 V across the light bulb.  This will allow the light bulb to have a brightness proportional to 2.5  W.   Assuming any resistors that you need, design and build a circuit that delivers the required current and voltage to the bulb.