Skip to content
Philoid
Browse Saved
Back to chapter
Physics
39. Alternating Current
Home · Class 12 · Physics · Ref. Book · 39. Alternating Current
Prev
Next
Q1 of 51 Page 329

A capacitor acts as an infinite resistance for

The resistance of a capacitor is given by , where ω = angular frequency of oscillation of current C = capacitance.


Now, in case of DC current, ω = 0.


Hence, the resistance for DC becomes = infinite. (Ans)

More from this chapter

All 51 →
13

A resistance is connected to an AC source. If a capacitor is included in the series circuit, will the average power absorbed by the resistance increase or decrease? If an inductor of small inductance is also included in the series circuit, will the average power absorbed increase or decrease further?

14

Can a hot-wire ammeter be used to measure a direct current having a constant value? Do we have to change the graduations?

2

An AC source producing emf


is connected in series with a capacitor and a resistor. The steady-state current in the circuit is found to be



3

The peak voltage in a 220 V AC source is

Questions · 51
39. Alternating Current
1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Back to chapter
ADVERTISEMENT
About Contact Privacy Terms
Philoid · 2026
  • Home
  • Search
  • Browse
  • Quiz
  • Saved