If potential difference and current flowing through a wire is increased twice each, then electric power
A. Will remain unaffected
B. Will increase four times
C. Will increase two times
D. Will decrease half
Answer: Option B
A. Will remain unaffected
B. Will increase four times
C. Will increase two times
D. Will decrease half
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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