A fuse wire is made of
A. an alloy of tin and copper
B. an alloy of tin and lead
C. an alloy of tin and aluminium
D. an alloy of nickel and chromium
Answer: Option B
A. an alloy of tin and copper
B. an alloy of tin and lead
C. an alloy of tin and aluminium
D. an alloy of nickel and chromium
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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