What would be the electric current in electric bulb from the source of 220 V. If the resistance of bulb filament is 1200 Ω?
A. 18 A
B. 0.18 A
C. 1.8 A
D. 0.018 A
Answer: Option B
A. 18 A
B. 0.18 A
C. 1.8 A
D. 0.018 A
Answer: Option B
What will be the total resistance of the three 20-Ω coils connected in series?
A. 40 Ω
B. 20 Ω
C. 60 Ω
D. 800 Ω
Superconductors are substances which
A. conduct electricity at lower temperature
B. offer high resistance to the flow of current
C. offer not resistance to the flow of current
D. conduct electricity at high temperature
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