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Maths-

General

Easy

Question

If the function $fraction numerator c o s invisible function application x plus K s i n invisible function application x over denominator 2 c o s invisible function application x plus 3 s i n invisible function application x end fraction$ is decreasing in its domain then $K E$

$(\frac{3}{2}, \infty)$
$(0, \frac{3}{2})$
$(- \infty, \frac{3}{2})$
$(- \infty, 0)$

The correct answer is: $open parentheses negative infinity comma fraction numerator 3 over denominator 2 end fraction close parentheses$

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In the experiment of potentiometer wire $A B$ is 100 cm long shown in figure When AC=40 cm, no deflection occurs in the galvanometer. What is the value of R ?

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physics-General

Consider the potentiometer circuit shown. The potentiometer wire is 600 cm long and having restance 15r At what distance from the point A should the jockey touch the wire to get zero deflection in the galvanometer?

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Circuit for the measurement of resistance by potentiometer is shown. The galvanometer is first connected at point-A and zero-deflection is observed at length PJ=10 cm. In the second case, it is connected at a point $C$ and zero deflection is observed at a length $30 text end text c m$ from P. Then what is the unknown resistance X?

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In a transistor amplifier β=62, $R subscript L$ =5000Ω and internal resistance of the transistor is 500Ω. What will be the ratio of power amplification to voltage amplification?

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In a transistor, a change of 8.0 in the emitter current produces a change of 7.8 mA in the collector current. What change in the base current is necessary to produce the same change in the collector current?

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What constitutes the reverse current?

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