A conducting rod long slides with a speed of on smooth

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A conducting rod

1.0\,\text{m}

long slides with a speed of

3.0\,\text{m s}^{-1}

on smooth, fixed, conducting rails that are

1.0\,\text{m}

apart and connected at one end by a resistor of

2\,\Omega

. A uniform magnetic field of

0.50\,\text{T}

is directed perpendicular to the plane of the rails. What is the magnitude of the current in the resistor? (a)

0.60\,\text{A}

(b)

0.75\,\text{A}

(c)

1.5\,\text{A}

(d)

0.38\,\text{A}