Question

Problem 82

Answer 1

Given information

The following things are given in the question:

Two resistance less rails rest    apart on a  ramp .

They are joined at the bottom by a    resistor.

At the top a copper bar of mass  is laid across the rails.

Resistance of the copper bar is ignored

 A vertical magnetic field of    is present.

The bar slides frictionlessly  down the rails 

 

 

 

Step-by-step explanation

Step 1.

Due to the motion of copper bar down the rail in the specified magnetic field  an emf is induced called motional emf 

An emf induced by the motion of the conductor across the magnetic field is called  motional emf force.

The equation is given by     and equation is true as long as the velocity, field, and length are mutually perpendicular.

Since the component of the velocity of the bar that is perpendicular to the magnetic field is  

here, the  motional emf is  

Induced Current , motional  emf and  Resistance is connected through the equation :

( ohms law)