in an electric circuit, a switch has________resistance?

Question

infinate,zero,little,or no effect on?

Answer 1

infinite....

A switch is either on or off. At the "off" state, there should be NO current flowing through the circuit, therefore infinite resistance.


Hope that helps,
Jon

Answer 2

A switch should have zero resistance in terms of calculating voltage drop, but in reality, all components have some resistance. The answer could really be any of the last 3, but I guess they want zero. And, there is no switch made that has "infinite" resistance. Most switches just have air between the contacts, and air only provides some level of protection from the current jumping the gap.

Answer 3

The switch has ``infinite´´ resistance in an off or open state.
The switch has very little resistance in an on or closed state.

Infinite is really practically infinite. For example, a lightning strike to the circuit could jump the air or other gap of the open switch. Especially if carbon traces lead to dielectric breakdown.

Answer 4

once you're saying that without resistance, the present = voltage, you're incorrect. The voltage would be at 3 volts on a similar time as the present will develop in the present day till something fails. even however, the "fee" of modern can equivalent the "fee" of voltage basically while the resistance = a million ohm. without exterior resistance, Kirchoff's voltage rule states that the flexibility source voltage (Vsource) would desire to equivalent the sum of the voltage drop in the time of any resistance of the motor's armature windings (Varmature) plus the back electro objective stress voltage generated by ability of the motor (Vemf). And the back emf voltage created by ability of the motor is proportional to that is angular speed. Vemf = motor angular speed * motor emf consistent Varmature = modern * armature winding resistance Vsource = Varmature + Vemf The armature winding resistance of a dc motor is in all hazard too low to degree with an ohmmeter. a technique typical with the aid of fact the Kelvin Resistance Measurment might would want for use to calculate this fee.

Answer 5

in an electric circuit, a switch has no effect on resistence

Answer 6

In theory:

Switch on means zero resistance,
Switch of means infinite resistance.

Practice

Switch on means litle resistance,
Switch of means resistance off the scale.

Answer 7

A switch is made up of a substance so it must have a little resistance(when it's on). When it's off, no current flows through it so it must have infinite resistance.

Answer 8

little resistance when on(closed), infinate resistance when off (closed)

Answer 9

Little resistance when on, no resistance when off

Answer 10

zero