KPTCL Government Jobs Exams Numerical Ability Trigonometry

What is the percentage error when 3 resistors with ratings 100 Ω at 5%, 150 Ω at 6% and
250 Ω at 8% respectively, are connected in series?
A) 6.33% B) 6.80%
C) 19% D) None of these

Read Solution (Total 2)

total error=100*.05+150*.06+250*.08
per(%)=(total error/total value)*100=(34/500)*100=6.80%
B)
9 years agoHelpfull: Yes(0) No(0)

B). 6.80% REGISTER 100*5/100+150*6/100+250*8/100 = 34 NOW TOTAL IS= 100+150+250=500 % = 34/500/100=6.80%
8 years agoHelpfull: Yes(0) No(0)

KPTCL Other Question

Consider a cube of material of sides 1 cm with a resistance of 0.003 Ω between its opposite
faces. What is the resistance if the same volume of the material is drawn into a length of 50
cm with a uniform cross – section?
A) 0.003 Ω B) 0.15 Ω
C) 7.5 Ω D) None of these