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Transformer

If a coil of ...

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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 the magnetic flux density in Wb/m2 is (A) 1 (B) 3( C) 2( D) 4

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Q. If a coil of

50

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}

Q. cm2If a coil of

40

4.0 c m^{2}

is suddenly removed from a magnetic field, it is observed that a charge of

2.0 \times 10^{- 4} C

flows into the coil. If the resistance of the coil is

80 Ω

, the magnetic flux density in Wb/m2 is

Q. A magnetic field of flux density

10 T

acts normal to a coil of

50

100

c m^{2}

area. The e.m.f. induced if the coil is removed from the magnetic field in

0.1

Q. A closed coil consists of

500

turns on a rectangular frame of area

4.0 {cm}^{2}

and has a resistance of

50 Ω

. The coil is kept with its plane perpendicular to a uniform magnetic field of

0.2 {wb/m}^{2}

, the amount of charge flowing through the coil if it is turned over (rotated through

180^{\circ})

Q. A coil of surface area

100 {c m}^{2}

50

turns is held perpendiculars to the magnetic field intensity

0.02 W b m^{- 2}

. The resistance of the coil is

2 Ω

. If it is removed from the magnetic field in

1 s

, the induced charge in the coil is ______

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