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4 Years Ago

A Copper Disc Of Radius 0.1 M Is Rotated About Its Centre With 20 Rev/s In An Uniform Magnetic Field Of 0.1 T With Its Plane Perpendicular To The Field. The Emf Induced Across The Radius Of The Disc

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The Figure Shows Three Circuits With Identical Batteries, Inductors And Resistances. Rank The Circuits According To The Currents Through The Battery Just After The Switch Is Closed, Greatest First

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A Step-down Transformer, Transforms A Supply Line Voltage Of 2200 V Into 220 V. The Primary Coil Has 5000 Turns. The Efficiency And Power Transmitted By The Transformer Are 90per And 8 KW

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In An AC Generator, A Coil With N Turns, All Of The Same Area A And Total Resistance R, Rotates With Frequency W In A Magnetic Field B. The Maximum Value Of Emf Generated In The Coil Is

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A Step-down Transformer Is Used On A 1000 V Line To Deliver 20 A At 120 V At The Secondary Coil. If The Efficiency Of The Transformer Is 80 Per, The Current Drawn From The Line Is

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A Transformer Has An Efficiency Of 80 Per. It Is Connected To A Power Input Of 5 KW At 200 V. If The Secondary Voltage Is 250 V, The Primary And Secondary Currents Are Respectively

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When The Current Changes From + 2 A To -2 A In 0.05 S, An Emf Of 8V Is Induced In A Coil. The Coefficient Of Self Induction Of The Coil Is

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What Should Be The Value Of Self Inductance Of An Inductor That Should Be Connected To 220 V, 50 Hz Supply, So That A Maximum Current Of 0.9 A Flows Through It ?

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Magnetic Flux Of 10 U Wb Is Linked With A Coil, When A Current Of 2mA Flows Through It. What Is The Self Inductance Of The Coil ?

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A Solenoid Of Inductance 2 H Carries A Current 1 A. What Is The Magnetic Energy Stored In A Solenoid ?

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A Solenoid Of Inductance 2 H Carries A Current 1 A. What Is The Magnetic Energy Stored In A Solenoid ?

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Induced Emf In The Coil Depends Upon

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In 0.1s, The Current In A Coil Increases From 1 A To 1.5 A. If Inductance Of Coil Is 60 MH, Then Induced Current In External Resistance Of 3 Will Be

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Energy Required To Establish A Current Of 4 A In A Coil Of Self Inductance L= 200 MH Is

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Quantity That Remains Unchanged In A Transformer Is

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The Turn Ratio Of A Transformer Is 1 : 2. An Electrolytic DC Cell Of Emf 2 V Is Connected To Its Primary. The Output Voltage Across Transformer Is

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Which Types Of Losses Do Not Occur In The Transformer ?

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4 Years Ago

A Transformer Is Used To Light A 100 W And 110 V Lamp From A 220 V Mains. If The Main Current Is 0.5 A, The Efficiency Of Transformer Is Approximately

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A Transformer Rated At 10 KW Is Used To Connect A 5 KV Transmission Line To A 240 V Circuit. The Ratio Of Turns In The Windings Of The Transformer Is

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The Number Of Turns In Primary And Secondary Coils Of A Transformer Is 50 And 200, Respectively. If The Current In The Primary Coil Is 4 A, Then The Current In The Secondary Coil Is

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4 Years Ago

A Six Pole Generator With Fixed Field Excitation Developes An Emf Of 100 V, When Operating At 1500 Rpm. At What Speed Must It Rotate To Develop 120 V ?

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Turn Ratio Is 1.25. The Step-up Transformer Operates At 230 V And Current Through Secondary Is 2 A. Then, Current In Primary Is

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4 Years Ago

Induction Furnace Is Based On The Heating Effect Of

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4 Years Ago

For A Large Industrial City With Much Load Variations, The DC Generator Should Be

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4 Years Ago

The Core Of A Transformer Is Laminated To Reduce

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4 Years Ago

A Transformer Works On The Principle Of

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4 Years Ago

A Step-down Transformer Has 50 Turns On Secondary And 1000 Turns On Primary Winding. If A Transformer Is Connected To 220 V And 1 A AC Source, What Is Output Current Of The Transformer ?

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4 Years Ago

The Materials Suitable For Making Electromagnets Should Have

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Magnetic Susceptibility Of A Diamagnetic Substance

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A Paramagnetic Liquid Is Taken In A U-tube And Arranged So That, One Of Its Limbs Is Kept Between Pole Pieces Of The Magnet. The Liquid Level In The Limb

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80 of 46300 Questions

Recent Questions

A Copper Disc Of Radius 0.1 M Is Rotated About Its Centre With 20 Rev/s In An Uniform Magnetic Field Of 0.1 T With Its Plane Perpendicular To The Field. The Emf Induced Across The Radius Of The Disc

The Figure Shows Three Circuits With Identical Batteries, Inductors And Resistances. Rank The Circuits According To The Currents Through The Battery Just After The Switch Is Closed, Greatest First

A Step-down Transformer, Transforms A Supply Line Voltage Of 2200 V Into 220 V. The Primary Coil Has 5000 Turns. The Efficiency And Power Transmitted By The Transformer Are 90per And 8 KW

In An AC Generator, A Coil With N Turns, All Of The Same Area A And Total Resistance R, Rotates With Frequency W In A Magnetic Field B. The Maximum Value Of Emf Generated In The Coil Is

A Step-down Transformer Is Used On A 1000 V Line To Deliver 20 A At 120 V At The Secondary Coil. If The Efficiency Of The Transformer Is 80 Per, The Current Drawn From The Line Is

A Transformer Has An Efficiency Of 80 Per. It Is Connected To A Power Input Of 5 KW At 200 V. If The Secondary Voltage Is 250 V, The Primary And Secondary Currents Are Respectively

When The Current Changes From + 2 A To -2 A In 0.05 S, An Emf Of 8V Is Induced In A Coil. The Coefficient Of Self Induction Of The Coil Is

What Should Be The Value Of Self Inductance Of An Inductor That Should Be Connected To 220 V, 50 Hz Supply, So That A Maximum Current Of 0.9 A Flows Through It ?

Magnetic Flux Of 10 U Wb Is Linked With A Coil, When A Current Of 2mA Flows Through It. What Is The Self Inductance Of The Coil ?

A Solenoid Of Inductance 2 H Carries A Current 1 A. What Is The Magnetic Energy Stored In A Solenoid ?

A Solenoid Of Inductance 2 H Carries A Current 1 A. What Is The Magnetic Energy Stored In A Solenoid ?

Induced Emf In The Coil Depends Upon

In 0.1s, The Current In A Coil Increases From 1 A To 1.5 A. If Inductance Of Coil Is 60 MH, Then Induced Current In External Resistance Of 3 Will Be

Energy Required To Establish A Current Of 4 A In A Coil Of Self Inductance L= 200 MH Is

Quantity That Remains Unchanged In A Transformer Is

The Turn Ratio Of A Transformer Is 1 : 2. An Electrolytic DC Cell Of Emf 2 V Is Connected To Its Primary. The Output Voltage Across Transformer Is

Which Types Of Losses Do Not Occur In The Transformer ?

A Transformer Is Used To Light A 100 W And 110 V Lamp From A 220 V Mains. If The Main Current Is 0.5 A, The Efficiency Of Transformer Is Approximately

A Transformer Rated At 10 KW Is Used To Connect A 5 KV Transmission Line To A 240 V Circuit. The Ratio Of Turns In The Windings Of The Transformer Is

The Number Of Turns In Primary And Secondary Coils Of A Transformer Is 50 And 200, Respectively. If The Current In The Primary Coil Is 4 A, Then The Current In The Secondary Coil Is

A Six Pole Generator With Fixed Field Excitation Developes An Emf Of 100 V, When Operating At 1500 Rpm. At What Speed Must It Rotate To Develop 120 V ?

Turn Ratio Is 1.25. The Step-up Transformer Operates At 230 V And Current Through Secondary Is 2 A. Then, Current In Primary Is

Induction Furnace Is Based On The Heating Effect Of

For A Large Industrial City With Much Load Variations, The DC Generator Should Be

The Core Of A Transformer Is Laminated To Reduce

A Transformer Works On The Principle Of

A Step-down Transformer Has 50 Turns On Secondary And 1000 Turns On Primary Winding. If A Transformer Is Connected To 220 V And 1 A AC Source, What Is Output Current Of The Transformer ?

The Materials Suitable For Making Electromagnets Should Have

Magnetic Susceptibility Of A Diamagnetic Substance

A Paramagnetic Liquid Is Taken In A U-tube And Arranged So That, One Of Its Limbs Is Kept Between Pole Pieces Of The Magnet. The Liquid Level In The Limb

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