Which molecule has permanent dipole moment CO2 H2O CH4 O2 Combination of three e

Question

Which molecule has permanent dipole moment CO2 H2O CH4 O2 Combination of three electrons and three neutrons has _______ charge. -1.6 times 10-19 -3.2 times 10-19C -4.8 times 10-19C 4.8 times 10-19C Two same kinds of charges are placed 1.0 m apart. Where the third charged will be placed so that the total force on the third charge is zero. In the middle 1.0 m from one charge 0.75 from other charge zero The electric field of a negative point charge is Inward Outward Cancel each other Form a circle The distance between two conducting plates are decrease by a factor 2, the capacitor will increase by a factor of 2 decrease by a factor of 2 increase by a factor of 4 decrease by a factor of 4 Capacitance is a/an electrical properties geometrical properties magnetic properties

Explanation / Answer

15.

H2O

Since rest of the molecules have mirror symmetry, So they cannot have permanent dipole moment.

16.

neutron have zero charge

charge on single electron = -1.6*10^-19

Charge on 3 e + 3 n = 3*(-1.6*10^-19) + 3*0

total charge = -4.8*10^-19

17.

Fnet = F13 - F23 = 0

F13 = F23

kq1q3/r^2 = k*q2q3/(1 - r)^2

q1 = q2

1/r^2 = 1/(1 - r)^2

r/(r - 1) = 1

r = r - 1

r = 0.5 m , in the middle

18.

electric field of negative charge is inward

19.

C = e0*A/d

C2/C1 = d1/d2

C2 = C1*(1/(1/2)) = 2*C1

increased by a factor of 2

20.

Capacitance is an electrical properties

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