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When a proton is accelerated through 1 V, then its kinetic energy will be (a) 1840 eV (b) 13.6e V (c) 1 eV (d) 0.54 eV



When a proton is accelerated through 1 V, then its kinetic energy will be    


        (a)    1840 eV


        (b)    13.6e V


        (c)    1 eV


        (d)    0.54 eV


Grade:upto college level

4 Answers

Kevin Nash
askIITians Faculty 332 Points
10 years ago

(c)

Potential difference (V) = 1 V,

K.E. acquired = q V

=      1.6 × 10-19 x 1

=      1.6 × 10-19 joules

=      1 eV

ankit singh
askIITians Faculty 614 Points
3 years ago
If we accelerate an electron through a potential of 1 kV, it will gain 1 keV of energy. Now the proton has the same amount of charge as an electron. Hence it will also gain 1 keV of energy. The increased mass will mean the final velocity would be less.
Vikas TU
14149 Points
3 years ago
Dear student 
 
ΔKE=qV=eV=e×1×1eV
Hope this will help 
Good Luck 
Cheers............................................
Arju Kumar
26 Points
3 years ago
Ans (c).
Proton has charge that is “+1e” and when a charge is accelerated through potential then it aquire kinetic energy whiich is equal to charge*potential difference.
       So kinetic energy of proton=charge on proton * potential difference
     => kinetic energy of proton= (+1e)*(1V)
     => kinetic energy of proton=1eV
     
 

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