Nt1310 Unit 4

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b. What is the magnitude of currents I1 and I2.

c. What is the potential difference across the 10 Ω resistor?

d. What is the total current (IT) flowing through the circuit?

3. Three bulbs are connected to a 9 V battery as shown in the diagram below.

a. Which bulbs are in series?

b. What is the total resistance in the circuit?

c. What is the total current flowing in ammeter A?

d. What is the potential difference across bulb C?

e. What is the potential difference across bulb B?


1. The circuit diagram below represents a combination of resistors in series and parallel.

With switch S open.

a. Find the ammeter readinng on A.
b. Find the potential difference between point P and Q.

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Once you have the pencils taped or find a suitable cylinder, begin wrapping your wire around it tightly. Start in the middle of the wire and wrap the coil fifteen times toward one end and fifteen times toward the other. Once you have finished wrapping the coil, remove the pencils from the middle. This will leave you with two loose leads at either end of the coil.

Loop the loose ends around the coil. Wrap the loose ends around either side of the coil three or four times. This will help keep the coil wound tightly. Point the remaining loose ends straight out away from the coil.

Secure the battery. Use tape or clay to hold the battery in place on a flat surface like a tabletop or desk. This will allow you to connect it to the coil without having to hold it with your hands. Make sure the battery is laying on its side so that you can easily reach both terminals.

Strip the ends of the coil wire. Use wire strippers to remove the insulation on either end of the wire. These leads will connect to the battery and allow current to flow through the coil. For the best results, you can sand the ends of the leads as well. This will remove any film or protectant that may have been applied to the