While moving from one end to another end inside a solenoid, its magnetic field . . . . . . . .
A. increases
B. decreases
C. remains same
D. first increases then decreases
Answer: Option C
A. increases
B. decreases
C. remains same
D. first increases then decreases
Answer: Option C
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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