1. Which material is used to make the fuse wire. Why
2. What properties of tungsten make it suitable for being used as a filament in incandescent
lamps.
3. Why is an incandescent lamp filled with an inert gas or nitrogen?
Write the advantages of using LED lamps.
4. What are the different ways by which resistors can be connected?
Answers
Answer:
1.copper and silver
2.it is longer to use in incandescent lamps as a filament..
3.it not alows the bulb to fuse and when the bulb gets to be fused then the repairers imports these gase.....
Safer: LEDs are much cooler than incandescent lights, reducing the risk of combustion or burnt fingers.
Sturdier: LEDs are made with epoxy lenses, not glass, and are much more resistant to breakage.
4. R
3
are the three resistors.
I = electric current flowing through the circuit
V = the potential difference supplied by the battery
Applying the Ohm’s law to the entire circuit, we have
V=IR
On applying Ohm’s law to the three resistors separately, we further have
V
1
=IR
1
V
2
=IR
2
and V
3
=IR
3
The total potential difference across a combination of resistors in series is equal to the sum of potential difference across the individual resistors. That is,
V=V
1
+V
2
+V
3
Therefore, IR=IR
1
+IR
2
+IR
3
or
Equivalent resistance of the combination, R=R
1
+R
2
+R
3
Answer:
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