NEET 2015
- Exam
- NEET
- Year
- 2015
- Subject
- Physics
- Chapter
- Alternating Current
NEET 2015 · Physics · Alternating Current
A series R-C circuit is connected to an alternating voltage source....
A series R-C circuit is connected to an alternating voltage source. Consider two situations:
a. When capacitor is air filled.
b. When capacitor is mica filled.
Current through resistor is and voltage across capacitor is then:
a. When capacitor is air filled.
b. When capacitor is mica filled.
Current through resistor is and voltage across capacitor is then:
Options
- A
- B
- C
- D
Correct answer
A.
Step-by-step solution
i = \dfrac{v}{\sqrt{{R}^{2} + {\left(\dfrac{1}{Cω}\right)}^{2}}}
{V}_{C} = \dfrac{v}{\sqrt{{R}^{2} + {\left(\dfrac{1}{Cω}\right)}^{2}}} × \left(\dfrac{1}{Cω}\right)
{V}_{C} = \dfrac{V}{\sqrt{{\left(RCω\right)}^{2} + 1}}
If we fill a di-electric material
C ↑ \to {V}_{C} ↓