Hluav taws xob voltage - teeb meem thiab kev daws teeb meem

1. Txheeb xyuas lub zog hluav taws xob ntawm qhov chaw nyob ntawm 1 cm ntawm lub zog them 5.0 μ C. Coulomb tas li (k) = 9 x 10 ⁹ Nm ² C ⁻² , 1 μC = 10 ⁻⁶ C.

Paub:

Qhov nrug ntawm qhov them (r) = 1 cm = 1/100 m = 0.01 m = 10 ^-2 m

Tus nqi (q) = 5.0 μ C = 5.0 x 10 ^-6 C

Coulomb tas li (k) = 9 x 10 ⁹ Nm ² C ⁻²

Xav tau: Lub zog hluav taws xob (V)

Tshuaj:

Lub zog hluav taws xob:

Lub zog hluav taws xob yog 4.5 x 10 ⁶ Volts

[irp]

2. them Q₁ = 5.0 μC thiab them nqi Q₂ = 6.0 μC. Coulomb tus nqi tas mus li (k) = 9 x 10⁹ Nm²C^-2, 1 μC = 10^-6 C. Point A nyob nruab nrab ntawm cov nqi. Txheeb xyuas lub zog hluav taws xob ntawm qhov chaw A.

Paub:

Them Q ₁ = -5.0 μ C = -5.0 x 10 ^-6 C

Qhov nrug ntawm qhov chaw A ntawm Q ₁ = 10 cm = 0.1 m = 10 ^-1 m

Tus nqi Q ₂ = 6.0 μ C = 6.0 x 10 ^-6 C

Qhov nrug ntawm qhov taw tes a ntawm Q ₂ = 10 cm = 0.1 m = 10 ^-1 m

Coulomb tus nqi tas mus li (k) = 9 x 10 ⁹ Nm ² C ⁻²

Xav tau: Lub zog hluav taws xob ntawm qhov chaw A

Tshuaj:

Lub zog hluav taws xob 1 :

Lub zog hluav taws xob 2 :

Lub zog hluav taws xob ntawm qhov chaw A :

V = _V2 – _V1

V = (54 – 45) x 10 ⁴

V = 9 x 10 ⁴

[irp]

3. them q₁ = 5.0 μC thiab them nqi q₂ = 6.0 μC. Coulomb tus nqi tas mus li (k) = 9 x 10⁹ Nm²C^-2, 1 μC = 10^-6 C. Txheeb xyuas lub zog hluav taws xob ntawm qhov chaw A.

Paub:

Them Q ₁ = -5.0 μ C = -5.0 x 10 ^-6 C

Qhov nrug ntawm qhov chaw A ntawm Q ₁ = 40 cm = 0.4 m = 4 x 10 ^-1 m

Tus nqi Q ₂ = 6.0 μ C = 6.0 x 10 ^-6 C

Qhov nrug ntawm qhov chaw A ntawm Q ₂ = 50 cm = 0.5 m = 5 x 10 ^-1 m

Coulomb tus nqi tas mus li (k) = 9 x 10 ⁹ Nm ² C ⁻²

Xav tau: Lub zog hluav taws xob ntawm qhov chaw A

Tshuaj:

Lub zog hluav taws xob 1 :

Lub zog hluav taws xob 2 :

Lub zog hluav taws xob ntawm qhov chaw A :

V = V ₁ + V ₂

V = (-11.25 + 10.8) x 10 ⁴

V = -0.45 x 10 ⁴

V = -4.5 x 10 ³

Lub zog hluav taws xob ntawm qhov chaw A yog -4.5 x 10 ³ Volts