5.2 Concepts & units I

Electric _____ of a conductor is defined as potential difference across its ends divided by the current passing throught it.

• resistance
• current
• voltage

Symbol for electric resistance

• R
• r
• Ω

Unit for electric resistance

• ohm
• volts
• amperes
• coulombs

1 Ω =

• 1V / 1A
• 1A / 1V
• 1V x 1A

Ohm's Law states that electrical resistance is the same as long as _____ of resistor is constant.

• temperature
• voltage
• current
• emf

I 𝛼 V always in …

• Ohm's Law
• Coulomb's law
• emf
• ElectronVolt

In Ohm's Law there is always a positive gradient straight line in …

• Current-Voltage graph
• Voltage-current graph
• Resistance-Current graph
• Current-Resistance graph

Resistivity of material depends on …

• material of the conductor and temperature
• material of conductor
• the temperature

Resistance of materials is ____ proportional to the length of the wire

• directly
• inversely

Resistance of materials is ____ proportional to the cross-sectional area.

• inversly
• directly