IIT JEE Entrance Exam> -kinetic-energy...

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

Amit Saxena , 11 Years ago

Grade upto college level

4 Answers

Kevin Nash

Last Activity: 11 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

Last Activity: 4 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

Last Activity: 4 Years ago

Dear student

ΔKE=qV=eV=e×1×1eV

Hope this will help

Good Luck

Cheers............................................

Arju Kumar

Last Activity: 4 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