Which of the materials is most commonly used for the filaments in the incandescent lamps:
A) tungsten
B) tin
C) silver
D) asbestos
Correct Answer:
Verified
Q1: Sky appears to be blue because of:
A)radiation
Q2: Candle power is:
A)the luminous flux emitted by
Q3: An object which appears to be red
Q4: . Which of the following colour has
Q6: The expected life of an incandescent lamp
Q7: 'Camera' is actually a Latin word meaning
A)picture
Q8: The world's first photographic portrait studio was
Q9: The world's first all electric photographic studio
Q10: Incident light
A)falls on the subject
B)is reflected from
Q11: Who coined the term 'photography'?
A)fox talbot
B)nicephore niepce
C)sir
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