Question

Pls explain me step by step​

Answer 1

Answer:

sorry yar pic is not clear .....

Explanation:

plz take it pic again than send it ......

Answer 2

Question :

A magnetic field in a certain region is given by

• B = (40i - 18k) G

How much flux passes through a 5cm² are loop if the loop lies flat on xy - plane$.$

A) -900 nwb

B) -700 nwb

C) -200 nwb

D) -800 nwb

Answer :

We know that, 1 G = 10‾⁴ T

∴ (40i - 18k)G = (40i - 18k)×10‾⁴ T

Area = 5 cm² = 5 × 10‾⁴ m²

Direction of area vector = k

★ Magnetic flux passing through a surface placed in magnetic field is given by

• ∅ = B • A = BA cosθ

∅ denotes magnetic flux

B denotes magnetic field

A denotes area

• SI unit : weber (T m²)

➝ ∅ = B • A

➝ ∅ = (40i-18k)×10‾⁴ • (5×10‾⁴)k

• i • k = 0
• k • k = 1

➝ ∅ = -18 × 5 × 10‾⁸

➝ ∅ = -90 × 10‾⁸

➝ ∅ = -900 nwb

∴ (A) is the correct answer!