Bulbs in a parallel circuit draw the same amount of current, so each will display the same brightness. Bulbs in a series circuit share the current so all bulbs will appear dimmer.
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it has more energy than one bulb
To answer this question, you need to know how many amps the circuit that is connected to the light bulb can handle. For home applications with a 15 amp circuit and no other loads connected you get: Power = Current * voltage, Substituting the known information yields: power = 15 amps * 110 volts, which is 1650 watts of total capacity. You have 100 watt bulbs, so: 1650/100 = 16.5 bulbs If your circuit is other than 15 amps, or if there is additional loads on the circuit, you must adjust the current or total capacity accordingly
Integrated circuit
This would be "side by side"
Well, honey, a galvanometer shows one-sided deflection in a meter bridge experiment because the galvanometer is connected in series with the unknown resistance being measured. The current flows through the galvanometer in one direction only, causing it to deflect to one side. It's just the way the cookie crumbles in the world of electrical measurements, sugar.