Does it matter which way a resistor is installed?

Resistors are blind to the polarity in a circuit. Thus, you don’t have to worry about installing them backwards. Current can pass equally through a resistor in either direction.

Why is a circuit connected to ground?

Electrical devices are “grounded” when they connect to grounding devices for safety reasons. Grounding provides a safe “path of least resistance” for stray voltage to follow. Without grounding, power surges or equipment damage could render electrical circuits dangerous or destructive.

What is the purpose of connecting a resistor?

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.

Do resistors go before LED?

It doesn’t matter! The resistor can go before – or after – the LED, and it will still protect it. the current that flows out of a battery is always equal to the current that flows back into the battery. The current through the resistor is the same as the current through the LED.

Why do we ground things?

One of the most important reasons for grounding electrical currents is that it protects your appliances, your home and everyone in it from surges in electricity. If lightning was to strike or the power was to surge at your place for whatever reason, this produces dangerously high voltages of electricity in your system.

What happens when resistors are connected in parallel?

When resistors are connected in parallel, more current flows from the source than would flow for any of them individually, so the total resistance is lower. Each resistor in parallel has the same full voltage of the source applied to it, but divide the total current amongst them.

Why is the pull-down resistor needed between the emitter and ground?

A pull-down resistor connects unused input pins (OR and NOR gates) to ground, (0V) to keep the given input LOW.