Which of the following is false about a wire carrying current to the right?
a. Comparing how the wire looks when viewed from in front of the page or from behind the page and considering what one expects if the current changes direction shows that the radial component of the magnetic field must be zero.
b. Since the field must be perpendicular to the current, the component of field parallel to the wire must be zero.
c. Application of Ampere’s law shows that the component of the field that circles the wire decreases as the inverse of the distance to the wire.
d. The law of Biot-Savart cannot be used to calculate the field due to the wire.
Homework Answers
The false statement for a wire carrying current to the right is
(D) the law of biot Savart cannot be used to calculate the field due to the wire .
It is so because, law of biot Savart is the most basic and fundamental law of magnetic effect of current and is applicable for almost all symmetrical current carrying configuration such as wire , cylinder, etc ..
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