MCQ
Force between two charges at rest is $........$?
- ✓electrostatic force.
- Belector magnetic force.
- Creal force.
- Ddynamic force.
Force between two charges at rest is electrostatic force of coulomb's law.
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$\left(\right.$ Given $\left.\mu_{r}=1\right)$
$(1)$ $|\Delta \phi|$ remains the same if the parabolic wire is replaced by a straight wire, $y=x$ initially, of length $\sqrt{2} L$
$(2)$ $|\Delta \phi|$ is proportional to the length of the wire projected on the $y$-axis.
$(3)$ $|\Delta \phi|=\frac{1}{2} B _0 V _0 L$ for $\beta=0$
$(4)$ $|\Delta \phi|=\frac{4}{3} B_0 V_0 L$ for $\beta=2$