Resistance and Circuit Experiment Concepts

The video tutorial explains an experiment to determine the resistance per centimeter of a wire by plotting a graph of potential difference versus current. It outlines the required equipment, including a screw gauge, battery, and voltmeter, and provides a detailed procedure for setting up the experiment. The tutorial guides viewers through recording observations, plotting graphs, and calculating the resistance and resistivity of the wire. The resistance per cm is found to be 0.066 ohms, and the resistivity is 1.01 x 10^-6 ohm m.

What is the primary aim of the experiment discussed in the video?

• To measure the length of a wire

• To calculate the voltage of a battery

• To find the current in a circuit

• To determine the resistance per centimeter of a wire

Which of the following is NOT listed as a required material for the experiment?

• Screw gauge

• Voltmeter

• Battery

• Thermometer

What is the first step in setting up the experiment?

• Insert the oneway key

• Plot a graph of potential difference versus current

• Measure the length of the resistance wire

• Connect the positive terminal of the battery to the positive terminal of the ammeter

How should the resistance wire be connected in the circuit?

• In series with the ammeter

• In series with the voltmeter

• In parallel to the terminals of the voltmeter

• Directly to the battery

What should be done after inserting the key in the circuit?

• Disconnect the battery

• Adjust the sliding contact of the riat

• Remove the resistance wire

• Measure the diameter of the wire

How many sets of independent observations should be taken during the experiment?

• At least two

• At least three

• At least five

• At least ten

What is the purpose of using a screw gauge in this experiment?

• To measure the voltage

• To measure the current

• To measure the diameter of the wire

• To measure the resistance

What is the resistivity of the material of the given wire as calculated in the experiment?

• 1.01 into 10^-6 ohm m

• 0.066 ohms per cm

• 0.1 ohm m

• 1.5 into 10^-6 ohm m

What is the resistance per centimeter of the given wire?

• 0.066 ohms per cm

• 0.1 ohms per cm

• 0.05 ohms per cm

• 0.08 ohms per cm

Which reading is NOT required to calculate the diameter of the wire using a screw gauge?

• Pitch scale reading

• Head scale reading

• Voltage reading

• Length of the wire