If a coil of 50 turns area 5-0 cm 2 is suddenly removed from magnetic field- It is observed that charge of 5 - 10-4 C flows into the coil- If the resistance of the coil is 100 - the magnetic flux density in W b - m 2 isA- 2B- 3C- ZeroD- 5

The correct option is A 2Amount of charge flowing is nbsp; Δ Q = Δϕ/R ⇒Δϕ = Δ Q × R ⇒Δϕ= 5 × 10^ 4× 100 By definition nbsp;Δϕ = nbsp; ϕ_f ϕ_i NBA 0 = ...

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Standard XII

Physics

Mutual Induction

If a coil of ...

Question

If a coil of $50$ turns area $5.0 c m^{2}$ is suddenly removed from magnetic field. It is observed that charge of $5 \times 10^{- 4} C$ flows into the coil. If the resistance of the coil is $100 Ω$ , the magnetic flux density in $W b / m^{2}$ is

2

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Solution

The correct option is A $2$
Amount of charge flowing is

$Δ Q = \frac{Δ ϕ}{R}$
$\Rightarrow Δ ϕ = Δ Q \times R$
$\Rightarrow Δ ϕ = 5 \times 10^{- 4} \times 100$

By definition $Δ ϕ = ϕ_{f} - ϕ_{i}$
$N B A - 0 = 5 \times 10^{- 2}$
$50 \times B \times 5 \times 10^{- 4} = 5 \times 10^{- 2}$
$B = 2 T$

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If a coil of 50 turns area 5.0 cm2 is suddenly removed from magnetic field. It is observed that charge of 5×10−4 C flows into the coil. If the resistance of the coil is 100 Ω, the magnetic flux density in Wb/m2 is

The correct option is A 2Amount of charge flowing is ΔQ=ΔϕR ⇒Δϕ=ΔQ×R ⇒Δϕ=5×10−4×100 By definition Δϕ=ϕf−ϕi NBA−0=5×10−2 50×B×5×10−4=5×10−2 B=2 T

If a coil of $50$ turns area $5.0 c m^{2}$ is suddenly removed from magnetic field. It is observed that charge of $5 \times 10^{- 4} C$ flows into the coil. If the resistance of the coil is $100 Ω$ , the magnetic flux density in $W b / m^{2}$ is