As Shown in the Figure, a Metal Bar Is in Contact

question 128

Multiple Choice

As shown in the figure, a metal bar is in contact with a pair of metal parallel rails. A steady uniform magnetic field B, perpendicular to the plane of the rails and pointing outward from the page, is present. The bar is in downward motion with velocity of magnitude ν. The direction of the induced current through the resistor R is

• A)from a to b.
• B)from b to a.
• C)No current is induced.

---

Definitions:

Robins

Small, common songbirds known for their reddish-orange breasts and melodious songs.

Build Nests

The behavior employed by certain animals, mainly birds and some mammals, to create a safe place for laying eggs or raising their young.

Body Fluids

Liquids originating from inside the body that play crucial roles in its functioning, such as blood, urine, and saliva.

Thirst

The sensation of needing or desiring to drink fluids.