Both ends of the battery are connected, to make a complete circuit.
No
do not touch alighted electric bulb conncted to the main
Center terminal is connected to the positive from the battery. Outside is connected to ground (-).
I wasn't there, didn't observe the experiment, and haven't had the opportunity to inspect the schematic diagram or review the circuit configuration. But if I had to guess ... which I obviously do ... it would be my guess that EITHER each bulb has its own individual battery or power supply, OR that both bulbs share the same power supply and are connected to it in parallel.
The bulb will burn for 15 minutes.
You need a Battery, Light Bulb, Ammeter, Switch.
The battery connected to the bulb has the potential chemical energy in it when it is connected by means of wire to the bulb the chemical energy in the battery is converted to the electrical energy which flows through the wire to the bulb glows the bulb which is a form of light energy after some time the bulb starts emitting heat which is heat energy.
the bulb will glow and ammeter will show the reading
if the one bulb is not lighted the all is no lighted
Nothing, glass is an insulator.
A light bulb is not lit when the swtich is not connected to the wire becasue there is no flow of electricity, specifically, flow of electrons. By disconnecting the wire, the bulb is no longer connected to the electricity source.
Chemical Electrical Light
there will be little or no change