Electrical Engineering - Ohm's Law - Discussion
Discussion Forum : Ohm's Law - General Questions (Q.No. 23)
23.
A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.
40 
4
2
20
Discussion:
19 comments Page 2 of 2.
Sadbi Ahmad said:
9 years ago
Thank you everybody for solving the solution.
Sugasini said:
1 decade ago
R=V/I
R1+R2=120/3=40
SO, R1=40-20=20
ANS 20
R1+R2=120/3=40
SO, R1=40-20=20
ANS 20
Vikas said:
7 years ago
Thanks a lot for explaining the solution.
Jagadish said:
9 years ago
I got it, Thanks @Raji.
Anand said:
1 decade ago
Nice answer sugasini
Victor said:
8 years ago
Thank you @Darshan.
(1)
Sibananda chakra said:
1 decade ago
Thank you. Friend.
Suresh said:
8 years ago
Thank you all.
Singh said:
3 years ago
Thank you.
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