Respuesta :
Answer:
F = -8.91 x 10⁻¹⁷ N
[tex]\Delta KE = 2.67\times 10^{-19}\ J[/tex]
Explanation:
given,
Electric field, E = 557.0 N/C
charge of electron,q = -1.6 x 10⁻¹⁹ C
a) Force on the electron
we know,
F = q E
F = -1.6 x 10⁻¹⁹ x 557.0
F = -8.91 x 10⁻¹⁷ N
negative sign of force indicate that force is acting in downward direction.
b) deflection of electron,d =3 mm = 0.003 m
[tex]\Delta KE = W[/tex]
[tex]\Delta KE = F.d[/tex]
[tex]\Delta KE = -8.91\times 10^{-17}\times 0.003[/tex]
[tex]\Delta KE = 2.67\times 10^{-19}\ J[/tex]
Increase in Kinetic energy is equal to [tex]\Delta KE = 2.67\times 10^{-19}\ J[/tex]
