Physics - Questions (Section-1)
67Identify the vector quantity from the following
A. HeatB. Angular momentum
C. Time D. Work
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68Large astronomical telescopes always use as objective
A. lensB. mirror
C. combinations of lenses D. None of the above
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69Natural radioactivity was discovered by
A. Marie CurieB. Ernest Rutherfor
C. Henri Becquerel D. Enrico Fermi
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70One should not connect a number of electrical appliances to the same power socket because
A. this can damage the appliances due to overloadingB. this can damage the domestic wiring due to overloading
C. this can damage the electrical meter D. the appliance will not get full voltage
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71Planets are
A. luminous heavenly bodies revolving around a starB. non-luminous heavenly bodies
C. luminous heavenly bodies that twinkle D. luminous heavenly bodies that do not twinkle
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72Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this? DiffusionRefractionInternal reflection
A. I, II and IIIB. I and II
C. II and III D. I and III
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