1. If the field lines would cross each other then the direction of field line would change at the point of crossing which is practically impossible. Hence, two magnetic field lines never intersect each other.

    If the field lines would cross each other then the direction of field line would change at the point of crossing which is practically impossible. Hence, two magnetic field lines never intersect each other.

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  2. Properties of magnetic field lines: (a) Magnetic field lines follow the direction from the north pole to the south pole. (b) Magnetic field lines always show concentric pattern. (c) Magnetic field lines do not cross one another. (d) Closer the field lines; stronger is the magnetic field and vice-verRead more

    Properties of magnetic field lines:
    (a) Magnetic field lines follow the direction from the north pole to the south pole.
    (b) Magnetic field lines always show concentric pattern.
    (c) Magnetic field lines do not cross one another.
    (d) Closer the field lines; stronger is the magnetic field and vice-versa is also true.
    (e) Magnetic field lines are closer near the poles; which shows greater strength of magnetic field near the poles.

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  3. When a compass needle is brought near a bar magnet, the compass needle experiences a deflection. This happens because of interaction of magnetic fields of the compass needle and the bar magnet.

    When a compass needle is brought near a bar magnet, the compass needle experiences a deflection. This happens because of interaction of magnetic fields of the compass needle and the bar magnet.

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  4. Environmental consequences of increasing demand for energy are as follows: 1.Use of fossil fuels is increasing air pollution which is not good for our health. 2. Air pollution is causing much damage to the ecosystem. 3. Greenhouse effect has resulted in global warming which is manifesting itself inRead more

    Environmental consequences of increasing demand for energy are as follows:

    1.Use of fossil fuels is increasing air pollution which is not good for our health.

    2. Air pollution is causing much damage to the ecosystem.

    3. Greenhouse effect has resulted in global warming which is manifesting itself in strange changes in the weather pattern around the world.

    4. Too much exploitation of fossil fuels is going to create a situation when there would be not fossil fuel.

    Steps to reduce energy consumption:

    1. Judicious use of energy is the only way.

    2. Use public transport instead of private modes of transport.

    3. Use bicycle whenever possible.

    4. Walk for short distance commute.

    5. Avoid unnecessary use of modern gadgets which consume lot of energy.

    6. Get a solar water heater installed for winter.

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  5. Advantages of Solar Cooker: - They are environment friendly. - Use of a solar cooker does not involve recurring expenses on fuel. Disadvantages of Solar Cooker: - Solar cooker is very slow. - Solar cooker can work only during summer months and is useless during winters and on cloudy days. - Solar coRead more

    Advantages of Solar Cooker:

    – They are environment friendly.

    – Use of a solar cooker does not involve recurring expenses on fuel.

    Disadvantages of Solar Cooker:

    – Solar cooker is very slow.

    – Solar cooker can work only during summer months and is useless during winters and on cloudy days.

    – Solar cooker can be useful at those places which receive plenty of sunshine. This is useless in colder climates.

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