$CATEGORY: Science - Khan Academy/12.Electricity/12.Electricity--Ohms Law

//Multiple Choice

Ohm's law states that the current flowing through a conductor is directly proportional to\: {
    =Voltage
    ~Resistance
    ~Temperature
    ~Power
}

The slope of the I-V graph for a conductor obeying Ohm's law gives\: {
    ~Resistance
    =Conductance
    ~Voltage
    ~Power
}

In the I-V graph of a resistor, a straight line passing through the origin represents\: {
    =A resistor obeying Ohm’s law
    ~A resistor not obeying Ohm’s law
    ~A non-linear resistor
    ~None of the above
}

If the resistance of a conductor is doubled, the current for the same voltage will\: {
    ~Become double
    ~Remain the same
    =Become half
    ~Become zero
}

Ohm’s law is not applicable to\: {
    =Semiconductor diodes
    ~Resistors
    ~Conductors
    ~Metals at constant temperature
}

//True or False

Ohm's law is applicable only when the physical conditions such as temperature remain constant. {T}

The slope of the I-V graph is the same for all materials. {F}

The resistance of a conductor decreases as the temperature increases. {F}

For a conductor obeying Ohm’s law, the ratio of voltage to current is constant. {T}

In an I-V graph, a steeper slope represents a lower resistance. {F}


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