# The ratio of mass densities of nuclei 40Ca and 16O is close to   (a) 0.1 (b) 1 (c) 2 (d) 5

## Question ID - 51197 :- The ratio of mass densities of nuclei 40Ca and 16O is close to   (a) 0.1 (b) 1 (c) 2 (d) 5

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Answer Key : (b) -

Densities of nucleus happen to be constant, irrespective of mass number.

Next Question :
 A common emitter amplifier circuit, built using an npn transistor, is shown in the figure. Its dc current gain is 250, RC = 1 k  and VCC = 10 V. What is the minimum base current for VCE to reach saturation? (a) 10 A (b) 100 A (c) 7 A (d) 40 A

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