If the diameter of a wire is reduced to half, then what will be the value of the current flowing through the wire.
A. one fourth
B. half
C. double
D. four times
Answer: Option A
A. one fourth
B. half
C. double
D. four times
Answer: Option A
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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