All the components in a circuit have a potential effect on the total current used by the circuit. You have to be more specific to get a more precise answer.
transistor
A resistor is a passive two-terminal electrical component that limits the current flowing in electrical or electronic circuits.
It measures resistance in a component or circuit to determine if there is a break in that circuit or component. If there's no resistance, it means there's a break, as no electrical current is passing through.
The current flowing in an electrical circuit.
A cold circuit
An electrical device activated by a current that opens or closes another circuit is called a relay. A contactor also falls into this category.
Electrical energy = (power) multiplied by (time) or (voltage across a component or circuit) times (current through it) times (time)
A resistor is a component of an electrical circuit that resists the flow of electrical current. A resistor has two terminals across which electricity must pass, and is designed to drop the voltage of the current as it flows from one terminal to the next. A resistor is primarily used to create and maintain a known safe current within an electrical component.
An electrical circuit.
Closing a switch in an electrical circuit will complete the circuit. The supply voltage will then be applied to that circuit, and current will flow through that circuit.
Hopefully not!Well... in certain circumstances part of your body can be an electrical component in a circuit. For instance, when you touch a touch-sensitive screen, your body is actually changing the capacitance of an electrical circuit in that screen and a very tiny electrical charge - maybe only a few millionths of an amp - will flow through your finger for a very short period of time. Another example is if you are unlucky enough to receive an electric shock from the household electrical power supply: your body will carry a much larger current - maybe several thousandths of an amp - but, if the circuit has been properly hooked up, that current will flow for only a very short period of time - a few thousands of a second - until a circuit breaker trips to break the supply of current.
A seríes circuit will not work when a component burns out, because then no current can pass around the circuit.