Physics
Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?

Jet streams are typically continuous over long distances.
It is narrow band of high-velocity wind.
It follows the wave path near the tropopause at elevations of 8 km to 15 km.
In summer, the polar front jet achieves its maximum force.

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Physics
Dynamo is a device for converting

Heat energy into electrical energy
Mechanical energy into electrical energy
Chemical energy into electrical energy
Magnetic energy into electrical energy

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Physics
Solar eclipse will take place when

the moon is between the sun and the earth
the earth is between the moon and the sun
the moon does not lie on the line joining the sun and the earth
the sun is between the moon and the earth

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