451.  If the temperature of a semiconductor rises, what is its resistivity?

Answer & Explanation
Decrease

452.  'mho' is the unit of which unit?

Answer & Explanation
Specificresistance

453.  In which type of climate does the temperature never rise above 10 ° C throughout the year?

Answer & Explanation
Tundra Climate

454.  What is the product of the time period of a wave and its frequency?

Answer & Explanation
Unity

455.  What is the name of the scientist who stated that matter can be converted into energy?

Answer & Explanation
Einstein

456.  What is the situation with increasing unemployment and inflation termed?

Answer & Explanation
Stagflation

457.  The unidirectional property of a pn-junction is useful for its use as which thing?

Answer & Explanation
Rectifier

458.  Who firstly demonstrated experimentally the existence of electromagnetic wave?

Answer & Explanation
Hertz

459.  Heating pyrites in air to remove sulphur is known as which name?

Answer & Explanation
Roasting

460.  Thermal decomposition of alkanes is known as which name?

Answer & Explanation
Cracking

461.  By which impact is Nuclear fission is caused?

Answer & Explanation
Neutron

462.  Comets revolve around which body?

Answer & Explanation
Sun

463.  Which energy of the electron at absolute zero is called?

Answer & Explanation
Fermi energy

464.  Which layer of the earth is believed to have the heaviest mineral materials of highest density?

Answer & Explanation
Central core

465.  When milk is churned, how does the cream separate from it?

Answer & Explanation
Due to the centrifugal force
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