a) Clock wise direction b) Anti clock wise direction c) Either clockwise (or) A. tio kwise direction d) Indefinite 3. The magnitude of the fiela produced by an electric current can be determined by using a) Joule's law b) Ohm's law c) Biot - Savarts law d) Amperes law In SL unit of nermeability of free cnace a) 4n x10 henry/metre b) 4x10 henry/metre

a) Clock wise direction b) Anti clock wise direction c) Either clockwise (or) A. tio kwise direction d) Indefinite 3. The magnitude of the fiela produced by an electric current can be determined by using a) Joule's law b) Ohm's law c) Biot - Savarts law d) Amperes law In SL unit of nermeability of free cnace a) 4n x10 henry/metre b) 4x10 henry/metre