Physics-
General
Easy

Question

The angle of dip is the angle

  1. Between the vertical component of earth's magnetic field and magnetic meridian    
  2. Between the vertical component of earth's magnetic field and geographical meridian    
  3. Between the earth's magnetic field direction and horizontal direction    
  4. Between the magnetic meridian and the geographical meridian    

The correct answer is: Between the earth's magnetic field direction and horizontal direction

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If the normal at the points Pi (xi, yi), i = 1 to 4 on the hyperbola xy = c2 are concurrent at the point Q(h, k), then fraction numerator open parentheses x subscript 1 end subscript plus x subscript 2 end subscript plus x subscript 3 end subscript plus x subscript 4 end subscript close parentheses open parentheses y subscript 1 end subscript plus y subscript 2 end subscript plus y subscript 3 end subscript plus y subscript 4 end subscript close parentheses over denominator x subscript 1 end subscript x subscript 2 end subscript x subscript 3 end subscript x subscript 4 end subscript end fractionis equal to

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Hence the most general form of the equation of such a conic is given byblank a x to the power of 2 end exponent plus 2 h x y plus b y to the power of 2 end exponent plus 2 f y equals 0.
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Hence the most general form of the equation of such a conic is given byblank a x to the power of 2 end exponent plus 2 h x y plus b y to the power of 2 end exponent plus 2 f y equals 0.
Let foci of the conic represented by the equationblank a x to the power of 2 end exponent plus 2 left parenthesis a plus 2 right parenthesis x y plus a y to the power of 2 end exponent plus 2 f y equals 0, where a less than negative 1 and f not equal to 0be F subscript 1 end subscript left parenthesis 2 comma negative 3 right parenthesis blankandblank F subscript 2 end subscript left parenthesis 8 comma negative 5 right parenthesis. Then the feet of perpendiculars from F1 and F2 upon x-axis lie on the curve

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