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What is an Ohmic resistor ?...

What is an Ohmic resistor ?

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An ohmic resistor is a resistor which obeys ohm.s law. Examples are all metallic conductors such as silver, aluminium, copper, etc.
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What is a non-ohmic resistor ?

STATEMENT 1: The current density vec J at any point in ohmic resistor is in direction of electric field vec E at that point . STATEMENT 2: A point charge when released from rest in a region having only electrostatic field always moves along electric lines of force.

Knowledge Check

  • Which of the following is an ohmic resistance ?

    A
    LED
    B
    junction diode
    C
    filament of a bulb
    D
    nichrome wire.

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    STATEMENT 1: The current density vec J at any point in ohmic resistor is in direction of electric field vec E at that point . STATEMENT 2: A point charge when released from rest in a region having only electrostatic field always moves along electric lines of force.

    Give two differences between an ohmic and non ohmic resistor.

    Fig. shows I-V curves for two resistors. Identify the ohmic and non-ohmic resistors. Give a reason for your answer

    Draw a graph of potential difference (V) versus current (I) for an ohmic resistor.

    Draw a graph of Potential difference (V) versus Current (I) for an ohmic resistor.

    Resistors P , Q , and R in the circuit have equal resistances. If the battery is supplying a total power of 12 W , what is the power dissipated as heat in resistors R ?

    Three resistors are connected to a 12 V battery as shown in the figure given below : What is the potential difference across the parallel combination of 6 ohm and 12 ohm resistor ?

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