What is the net force experienced by a bar magnet placed in a uniform magnetic field?
A. Zero
B. Depends upon length of themagnet
C. Never zero
D. Depends upon temperature
Answer: Option A
A. Zero
B. Depends upon length of themagnet
C. Never zero
D. Depends upon temperature
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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