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andrey58
@andrey58
July 2022
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Домашнє завдання, 4 задачі
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Verified answer
1)
E=k*q/R^2
q=E*R^2/k = 1,18*10^7*(0,0030)^2/(8,988*10^
9) Кл ~
1,182E-08
Кл ~ 11,8 нКл
2)
ma=mg-q*E=0
E=m*g/q = σ/ε0
σ=ε*m*g/q =8,85*10^(-
12)*10^(-15)*9,81/(4,8*10^(-19)) Кл/м^2 =
1,809E-07
Кл/м^2
3)
mv^2/2=q*E*x
x=
mv^2/(2*q*E) =
(5*10^6)^2/(2*1,7588*10^11*150) м =
0,4738079
м ~
0,47
м
4)
Q=C1*φ1 =>
C1=
Q/φ1
Q=C2*φ2 => C2=
Q/φ2
2*Q=C*
φ
C=C1+C2=
Q/φ1+
Q/φ2
φ=2*Q/C=2*Q/(
Q/φ1+Q/φ2) =
2/(
1/φ1+1/φ2) =
2/(1/60+1/40) B = 48 B
3 votes
Thanks 1
andrey58
спасибо
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Answers & Comments
Verified answer
1)E=k*q/R^2
q=E*R^2/k = 1,18*10^7*(0,0030)^2/(8,988*10^9) Кл ~ 1,182E-08Кл ~ 11,8 нКл
2)
ma=mg-q*E=0
E=m*g/q = σ/ε0
σ=ε*m*g/q =8,85*10^(-12)*10^(-15)*9,81/(4,8*10^(-19)) Кл/м^2 = 1,809E-07 Кл/м^2
3)
mv^2/2=q*E*x
x=mv^2/(2*q*E) =(5*10^6)^2/(2*1,7588*10^11*150) м = 0,4738079м ~ 0,47м
4)
Q=C1*φ1 => C1=Q/φ1
Q=C2*φ2 => C2=Q/φ2
2*Q=C*φ
C=C1+C2=Q/φ1+Q/φ2
φ=2*Q/C=2*Q/(Q/φ1+Q/φ2) =2/(1/φ1+1/φ2) = 2/(1/60+1/40) B = 48 B