Monday, December 21, 2015
Sunday, December 20, 2015
What is the resistance of the combination of resistors?
5. What is the resistance of the combination of resistors?
x₁,
x₂, x₃, and
x₄ are some numbers.
Answer:
Answer:
(10³
x₁(
x₂+x₃)/(10³
x₁+x₂+x₃)
+ x₄) Ω
What Voltage is Necessary?
4. To store x₁ mJ of energy in an x₂ μF capacitor, what voltage is necessary?
x₁ and x₂ are some numbers.
Solution:
U = x₁ mJ = x₁ ∙ 10⁻³J
C = x₂ μF = x₂∙ 10⁻⁶ F
V²= 2U/C = 2x₁ ∙ 10⁻³J/(x₂∙ 10⁻⁶ F) = 2∙ 10³x₁/x₂ J/F
V=(2∙10³ x₁/x₂)⁰·⁵ V = 44.7(x₁/x₂)⁰∙⁵ V
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