If the resistance of the conductor is doubled then the electric current is halved. What causes this:
A. I = V - R
B. $$I = \frac{V}{R}$$
C. $$I = \frac{R}{V}n$$
D. I = VR
Answer: Option B
A. I = V - R
B. $$I = \frac{V}{R}$$
C. $$I = \frac{R}{V}n$$
D. I = VR
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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