[填空题]
The circuit shown in (Fidk:vk,2.hxc(uitr 86x b :wrig. Below a) us4j3 ee6s0gcia.p8f qxes a neon-filled tube as in (Fig. Below b). This neon lamp has a threshold voltq i8x.e3 jf60epc4asgage $V_0$ for conduction, because no current flows until the neon gas in the tube is ionized by a sufficiently strong electric field. Once the threshold voltage is exceeded, the lamp has negligible resistance. The capacitor stores electrical energy, which can be released to flash the lamp. Assume that $C=0.150\mathrm{~}\mu\mathrm{F},R=2.35\times10\mathrm{~}^6\Omega,V_0=90.0\mathrm{~V}$ and Ann meter=105 V
(a) Assuming that the circuit is hooked up to the emf at time $t\,=\,0$, at what time will the light first flash? s
(b) If the value of R is increased, will the time you found in part (a) increase or decrease?
(c) The flashing of the lamp is very brief. Why?
(d) Explain what happens after the lamp flashes for the first time.
a
b