DC Current -11- Electrical Resistance of a Lamp

Rebiaz Studio

A lamp draws a current of 0.4 Amperes when applied to it at 18 volts. What is the electrical resistance of the lamp?  Watch the video related to *DC CURRENT* in full: https://dailymotion.com/playlist/x93i4y

Transcript

00:01Hello friends, every day is a time to learn something new.

00:07All electronic devices have electrical resistance.

00:12In this series, we will learn to determine the electrical resistance of a lamp using an ammeter and a voltmeter.

00:22Of course, the problem sheet includes values for voltage and current.

00:30Before we go any further, it would be helpful to watch the following short animation.

00:36A lamp is connected to a DC voltage source.

00:42Once all the circuits are connected and the power is turned on, the lamp will glow.

00:50To measure the voltage of the lamp, we can use a voltmeter.

00:54To measure the current through the lamp, we can use an ammeter.

01:01The voltmeter and ammeter displays show specific values.

01:07If the ammeter reading is I, and the voltmeter reading is V, then V equals R times I.

01:21R is the resistance of the lamp, the value we want to calculate.

01:25At this point, we can refer to the problem sheet.

01:32The voltage is 18 volts.

01:35And the current is 0.4 amperes.

01:40This calculation is quite simple.

01:43R is approximately 45 ohms.

01:47This is the resistance value.

01:49RICHARD .

01:52R is amazing.

01:54Have a great life today!

01:56Happy learning everyone!

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