$CATEGORY: Science - Khan Academy/12.Electricity/12.Electricity--Factors on which Resistance of a conductor depends

//Multiple Choice

What is the SI unit of resistivity? {
    ~Ohm
    =Ohm-meter
    ~Siemens
    ~Volt
}

What is the reciprocal of resistivity called? {
    ~Resistance
    =Conductivity
    ~Power
    ~Voltage
}

Which material has the lowest resistivity? {
    =Copper
    ~Iron
    ~Nichrome
    ~Plastic
}

Resistivity depends on\: {
    ~Length and area of the conductor
    ~Material of the conductor
    ~Temperature of the conductor
    =Both b and c
}

Which of the following has high conductivity? {
    =Copper
    ~Rubber
    ~Wood
    ~Glass
}

//True or False

Resistivity is independent of the material of the conductor. {F}

Conductivity increases as resistivity decreases. {T}

Copper has lower resistivity than aluminum. {T}

Insulators have high resistivity and low conductivity. {T}

Resistivity depends on the length of the conductor. {F}

//Fill in the blanks



//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Resistivity -> Ohm-meter
=Conductivity -> Siemens per meter
=Good conductor -> Low resistivity
=Poor conductor -> High resistivity
=Reciprocal of resistivity -> Conductivity
}


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