Circuits and Resistance

What is resistance in an electric circuit?

• Something that controls the flow of current

• Something that increases the flow of current

• Something that has no effect on the flow of current

• Something that stops the flow of current

How does the current reading change if the resistance is more in a circuit?

• The current reading will be higher

• The current reading will be lower

• The current reading will fluctuate

• The current reading will remain the same

What are the factors on which the resistance of a conductor depends?

• Voltage, current, and power

• Temperature, pressure, and density

• Frequency, wavelength, and amplitude

• Length, cross-sectional area, and material

When can we say that the resistance of a conductor is more than that of another?

• When the length is shorter and the cross-sectional area is larger

• When the material is an insulator and the cross-sectional area is smaller

• When the material is a good conductor and the length is longer

• When the length is longer and the cross-sectional area is smaller

What happens to the current when the length of the nichrome wire is doubled?

• The current fluctuates

• The current remains the same

• The current is doubled

• The current is halved

What happens to the current when the thickness of the wire is increased without changing the length?

• The current fluctuates

• The current remains the same

• The current decreases

• The current increases

What is the SI unit of resistivity?

• Ohm meter

• Volt meter

• Ampere meter

• Watt meter

What does the resistance of a conductor depend on?

• Frequency, wavelength, and amplitude

• Temperature, pressure, and density

• Voltage, current, and power

• Length, cross-sectional area, and material

What is the resistance of a conductor directly proportional to?

• Length

• Temperature

• Material

• Cross-sectional area

What is the resistance of a conductor inversely proportional to?

• Temperature

• Length

• Material

• Cross-sectional area