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Physics

General

Easy

Question

A galvanometer, having a resistance of $50 subscript straight capital omega comma$ gives a fall scale deflection for a current of 0.05 A The length in metre of a resistance wire of are of cross-section 2.97 $cross times 10 to the power of negative 2 space end exponent c m to the power of negative 2 end exponent$ that can be used to convertt the galvanometer into an ammeter which can read a maximum of 5 A current is (specific resistance of wire= $5 cross times 10 to the power of negative 7 end exponent$ Ωm )

1.5
6
8
3

The correct answer is: 3

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Ahypothetical reaction , A→2B, proceed throughfollowingsequenceofsteps- A→C;ΔH=q1
C→D;ΔH=q2
$fraction numerator 1 over denominator 2 end fraction D rightwards arrow B semicolon capital delta H equals q subscript 3 end subscript$ Theheatofreactionis:

Ahypothetical reaction , A→2B, proceed throughfollowingsequenceofsteps- A→C;ΔH=q1
C→D;ΔH=q2
$fraction numerator 1 over denominator 2 end fraction D rightwards arrow B semicolon capital delta H equals q subscript 3 end subscript$ Theheatofreactionis:

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Theenthalpyofvapourisationofliquidwaterusing thedata :
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The heat of reaction for A+ 2O²→AOis-50Kcal and AO+2O²→AO2 is100Kcal.The heat of reaction

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Given that:
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