First slide

Motional EMF

Question

A conductor rod AB moves parallel to X-axis in a uniform magnetic field, pointing in the positive X-direction. The end A of the rod gets

Easy

A

positively charged
B

negatively charged
C

neutral
D

first positively charged and then negatively charged.

Solution

According to right hand palm rule, the Lorentz force on free electrons in the conductor will be directed towards end B. Hence, the end A gets positively charged.

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