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2 4 binding energy per nucleon 4 1H & 2 He r 1.1 Me V & 7MeV respectively den d energy released when 2 1H2 nulei fuse 2 form a 2He4 is ans is -2.8 MeV D frequencyof revolution in nth orbit of Bohr model of an atom is fn den d variation of log(fn/f1) wid log (n) can b qualitatively represented as (draw d graph 4 it plz giv d explanation 4 it) d ball of mass m falls vertically from a height h & collides wid a block of equal mass m which is moving horizontally on a horizontal surface , velocity of d block at d instant of collision is u. coefficient of friction btw d block & d horizontal surface is =0.2 & d coefficient of restitution is 0.5 den d velocity of d block decreases by a) 0 b)0.3 rt(2gh) c) 2 rt(2gh) d) u 2 identical positiv charges r fixed on d Y-axis at equal distances from d origin O a negativly charged particle starts on d -ve X-axis at a large distance from O moves along d X-axis passes thru O & goes far away from origin 2wards +ve X-axis amgnitude of d acceleration a due 2 +ve charges is plotted as a function of its +ve coordinate x as (draw d graph btw 'a' on Y-axis & x on X -axis)


                                             2         4
binding energy per nucleon 4 1H  & 2 He r 1.1 Me V & 7MeV respectively den d energy released when 2 1H2 nulei fuse 2 form a  2He4 is   ans is -2.8 MeV
 
 
D frequencyof revolution in nth orbit of Bohr model of an atom is fn den d variation of log(fn/f1) wid log (n) can b qualitatively represented  as
 
(draw d graph 4 it plz giv d explanation 4 it)
 
d ball of mass m falls vertically from a height h & collides wid a block of equal mass m which is moving horizontally on a horizontal surface , velocity of d block at d instant of collision is  u. coefficient of friction btw d  block & d horizontal surface is  =0.2 & d coefficient of restitution is 0.5 den d velocity of d block decreases by
a) 0 b)0.3 rt(2gh) c) 2 rt(2gh) d) u
 
2 identical positiv charges r fixed on d Y-axis at equal distances from d origin O a negativly charged particle starts on d -ve X-axis at a large distance from O moves along d X-axis passes thru O & goes far away from origin 2wards +ve X-axis amgnitude of d acceleration a due 2 +ve charges is plotted as a function of its +ve coordinate x as
 
(draw d graph btw 'a' on Y-axis & x on X -axis)
  


Grade:10

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