MDCAT Physics MCQ #983

MDCAT Physics MCQ #983

1. Question 1

   Q1. The magnetic field due to a long straight wire is given by?

   • A) \frac{\mu_0 I}{2\pi r}
   • B) \frac{\mu_0 I}{4\pi r}
   • C) \frac{\mu_0 I r}{2}
   • D) \frac{\mu_0 I}{2r}

   Answer: \frac{\mu_0 I}{2\pi r}

   Explanation: The formula \frac{\mu_0 I}{2\pi r} gives the magnetic field due to a long straight wire.