In festivals, we install colored lights. Now we have dozens of colored light bulbs on hand. When we work, the voltage at both ends is not more than 6.3V. We can only use the home circuit to supply power. The feasible way is () A. Connect 34 lights in series to the circuit B. connect 34 lights in parallel to the circuit C. connect 35 lights in series to the circuit D. connect 35 lights in parallel to the circuit

In festivals, we install colored lights. Now we have dozens of colored light bulbs on hand. When we work, the voltage at both ends is not more than 6.3V. We can only use the home circuit to supply power. The feasible way is () A. Connect 34 lights in series to the circuit B. connect 34 lights in parallel to the circuit C. connect 35 lights in series to the circuit D. connect 35 lights in parallel to the circuit

The voltage in the home circuit is 220 V, and the maximum voltage at both ends of the small bulb is 6.3 V, so the voltage at both ends of the color lamp is equal to the power supply voltage after the color lamp is connected in parallel, so the parallel connection can not be adopted; according to the voltage characteristics of the series circuit, the sum of the voltage on each lamp is equal to the total voltage, so the color lamp needs to be connected in series; the number of color lamps in series: n = 220 V 6.3 V ≈ 35 (pieces), so select C

If the voltage of the festival lantern is 2.8V, now connect it to the home circuit to make it work safely, what's the correct statement?
A connects 78 small color lights in series, B connects 78 small color lights in parallel
C connect 79 small color lights in Series D connect 79 small color lights in parallel

220 / 208 = 78.6, 79 small color lights in series C is correct
However, if one of the lights is broken, the circuit will not work