The resistance of the wire is inversely proportional to . . . . . . . .
A. Temperature
B. Resistivity
C. Length
D. Cross section area
Answer: Option D
A. Temperature
B. Resistivity
C. Length
D. Cross section area
Answer: Option D
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
resistance of wire is directly proportional to resistivity of material, length , temp and inversly proportional to cross sectional area.