Electricity: Magnetic and Heating Effects

Two identical bulbs are joined one after the other in a single loop with a battery. Vikram says the bulb nearer the battery will glow brighter, because the current is used up by the time it reaches the second one. Neha says both will glow equally. Who is right?

Tarun places a compass under a straight copper wire and switches the current on. The needle turns. He says the compass must be faulty, since copper is not magnetic. Rekha says the flowing current itself is doing it. Who is right?

Sara wires a torch circuit and puts the switch on the wire between the two cells, not next to the bulb. Dev says a switch will not work there; it has to be right before the bulb. Sara says anywhere in the loop is fine. Who is right?

In an electric heater the coil glows red hot, but the wire running from the plug to it stays cool. Salim says the current must be stronger inside the coil. Divya says the current is the same in both. Who is right?

Ravi tests which liquids carry electricity with a battery, a bulb and two wires. Tap water lights the bulb; distilled water does not. Ravi says the tester is faulty, because all water conducts electricity. Neeta says the tester is fine. Who is right?

Manoj's small battery fan has become slow. He says the battery must be finished. Bhavna says there could be other reasons. Who is right?