A car travels northward at 75 km/h along a straight road in a region where Earth's magnetic field has a vertical component of 0.50 *10^-⁴ T. The emf induced between the left and right side, separated by 1.7 m, is:

Question

Quizplus · Accepted Answer

The emf induced in a conductor moving in a magnetic field is given by the formula:

emf = Bvl

where B is the magnetic field strength, v is the velocity of the conductor, and l is the length of the conductor perpendicular to the magnetic field.

In this case, the velocity of the car is v = 75 km/h = 20.83 m/s. The length of the conductor is l = 1.7 m. The magnetic field strength is given as B = 0.50 × 10-4 T.

Plugging in these values, we get:

emf = (0.50 × 10-4 T) × (20.83 m/s) × (1.7 m)
emf = 1.79 × 10-5 V = 1.8 mV

So the correct answer is B) 1.8 mV.

A Car Travels Northward at 75 Km/h Along a Straight