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Physics

General

Easy

Question

Which of the following the correct relationship between two current gains $proportional to$ and β in a transistor?

$β = \frac{1 + α}{α}$
$β = \frac{α}{1 + α}$
$β = \frac{1 + β}{β}$
$β = \frac{β}{1 + β}$

The correct answer is: $beta equals fraction numerator beta over denominator 1 plus beta end fraction$

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The current gain of a transistor is 100 . If the base current changes by 200 $eta straight A$ , What is the change in collector current?

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A tank contains two different liquids which do not mix with each other as shown in figure. The lower and upper liquids are at depths $h subscript 1 end subscript$ and $h subscript 2 end subscript$ respectively. An object O is located at the bottom. When seen vertically from above, locate the position of image of O.

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In experiment of the potentiometer wire $A B$ of length 100 cm has a resistance of 10 $capital omega$ , It is connected in series with a resistance R and a cell of emf 2 volts and of negligible internal resistance. A Source of emf 10mV is balanced against a length of 40 cm of the potentiometer wire. What is the value of the external resistance?

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