Which of the following law describes the relation between the current flowing through a metallic wire and the Potential difference in its ends?
A. Ohm's law
B. Law of charges
C. Radiation law
D. Joule's law
Answer: Option A
A. Ohm's law
B. Law of charges
C. Radiation law
D. Joule's law
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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