A wire of length 10 cm, carrying 10 Amp of current is placed at
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    Subject
    Physics

    Class

    ICSE Class 12

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    ISC Class 12 Physics Solved Question Paper 2004

    Multiple Choice QuestionsShort Answer Type

    1. What is the locus of a point at which the electric field E due to an electric dipole is parallel to the line joining the charges +q and -q forming the dipole ?
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    2. State one important difference between Peltier’s Effect and Joule’s Effect.
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    3. Three bulbs of specifications 60 W/220 V, 100 W/220 V and 1000 W/220 V are connected in series. Which one will glow the brightest ?
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    4. State one important property of a standard cell.
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    5. A wire of resistance 20 Ω is bent in the form of a complete circle. Find the resistance between two diametrically opposite points.
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    6. What will be the direction of current at the cold junction of a thermocouple thermometer in which iron and copper is being used. (Fe to Cu or Cu to Fe). 
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    7.

    A wire of length 10 cm, carrying 10 Amp of current is placed at an angle of 53° with respect to a magnetic field B of strength 0.1 Tesla. Find the force experienced by the wire []

    Here,

    Length of wire, l = 10 cm = 0.10 m

    Current, i = 10 Amp.

    θ = 53°

    Magnetic field, B = 0.1 T

    F = ?

    sin 53o = 4/5 

    F = Bil sin  

      =  

       = 0.08 N 

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    8. Define ‘HYSTERESIS’.
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    9. Find the percentage increase in magnetic field intensity when a solenoid carrying current is filled with aluminium [x for A1 = 2.1 x 10-3 ].
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    10. How is an ideal inductor obtained?
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