Home
Class 12
PHYSICS
Figure shows the circuit of a flashing l...

Figure shows the circuit of a flashing lamp, used at construction sites. The fluorescent lamp L, having negligible capacitance, is connected in parallel across the capacitor C of an RC circuit . There is a current through the lamp only when the potential difference across it reaches the breakdown voltage `V_L)`. In this event, the capacitor discharges completley through the lamp and lamp flashes momentarily.

Consider an instant, when the capacitor has just discharged through the flash light. Taking this instant as t=0, the time after which the lamp flashes momentarily is given by

A

`T_(0) =RCln ((epsilon)/(epsilon-V_(L)))`

B

`T_(0) =RC[1-ln ((epsilon)/(V_(L)))]`

C

`T_(0)= RC ln ((epsilon)/(V_(L)))`

D

`T_(0)=RC ln ((epsilon-V_(L))/(epsilon))`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION-D( LINKED COMPREHENSION TYPE QUESTIONS) Comprehension - II|5 Videos

  • CURRENT ELECTRICITY

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION-E (ASSERTION-REASON TYPE QUESTION)|15 Videos

  • CURRENT ELECTRICITY

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION-C(OBJECTIVE TYPE QUESTION ))|13 Videos

  • COMMUNICATION SYSTEMS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT SECTION D (Assertion-Reason)|10 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-D)|10 Videos

Similar Questions

Explore conceptually related problems

Figure shows the circuit of a flashing lamp, used at construction sites. The fluorescent lamp L, having negligible capacitance, is connected in parallel across the capacitor C of an RC circuit . There is a current through the lamp only when the potential difference across it reaches the breakdown voltage V_1) . In this event, the capacitor discharges completley through the lamp and lamp flashes momentarily. Which of the following graphs represents the variation fo potential drop across the resistor ?

Figure shows the circuit of a flashing lamp, used at construction sites. The fluorescent lamp L, having negligible capacitance, is connected in parallel across the capacitor C of an RC circuit . There is a current through the lamp only when the potential difference across it reaches the breakdown voltage V_1) . In this event, the capacitor discharges completley through the lamp and lamp flashes momentarily. The number of flashes per second produced by the arrangement is ( neglecting th etime of flashing or discharging of capacitor)

In the given circuit, with steady current, the potential difference across the capacitor is

In the circuit shown in the figure, the potential difference across the 4.5 muF capacitor is

A capacitor or capacitance C_(1) is charge to a potential V and then connected in parallel to an uncharged capacitor of capacitance C_(2) . The fianl potential difference across each capacitor will be

An inductor L is allowed to discharge through capacitor C. The emf induced across the inductance when the capacitor is fully charged is

In the circuit shown in figure find a. the equivalent capacitance b. the charge stored in each capacitor and c. the potential difference across each capacitor.

A capacitor of capacity 2muF is changed to a potential different of 12V . It is then connected across an inductor of inductance 0.6mH What is the current in the circuit at a time when the potential difference across the capacitor is 6.0V ?

A capacitor of capacity 2muF is changed to a potential different of 12V . It is then connected across an inductor of inductance 0.6mH What is the current in the circuit at a time when the potential difference across the capacitor is 6.0V ?

The spirit lamp is made of