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Inductance Free Doubts and Solutions

CBSE - XII Science - Physics - Electromagnetic Induction

if the no. of turns of a solonoid is doubled keeping the other factor constant how does theself inductance of a solonoid change 
give some examples also 
 

Asked by saggugurupal 20th September 2016, 3:47 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

a 100 micro farad capacitor in series with a 40 ohms resistance is connected to a 110V , 60 Hz supply (a) what is the maximum current in the circuit (b) what is the time lag between the current maximum and voltage  maximum.

Asked by rutujasarangmehta 15th March 2016, 8:55 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A coil of inductance 0.5H and resistance 100 ohms is connected to a 240V , 50 Hz A.C supply (a) what is the maximum current in the coil ? (b) what is the time lag between the voltage maximum and current maximum.

Asked by rutujasarangmehta 15th March 2016, 8:49 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

A aeroplane is flying at a speed of 360kmph in a horizontal direction. A verticle field strength of earth's magnetic field is 2 x 10 raise to -5 T . if the distance between the tips of its wings is 10m, calculate the emf induced between the tips of the wings.

Asked by rutujasarangmehta 15th March 2016, 8:44 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

an air core solenoid with length 30 cm, area of cross-section 25cm sq and number of turns 500 carries a curent of 2.5A , the current is suddenly switched off in a brief time 10 raise to -3 secs . How much is the average back emf induced across the open switch in the circuit ?

Asked by rutujasarangmehta 15th March 2016, 8:25 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Obtain the expression for the mutual inductance between a long straight wire and a square loop of side a lie in the same plane X - O- Y.

Asked by vinitapahel123 1st December 2015, 3:56 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

How is the mutual inductance of a pair of coils affected when: (i) Separation between the coils is increased? (ii) The number of turns of each coil is increased? (iii) A thin iron sheet is placed between the two coils, other factors remaining the same? Explain your answer in each case.

Asked by Topperlearning User 7th July 2015, 2:32 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

A plot of magnetic flux(f)versus current(I) is shown in the figure for two inductors A and B. Which of the two has larger value of self inductance?  

Asked by Topperlearning User 7th July 2015, 2:31 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

How does the self-inductance of an air coil change, when (i) the number of turns in the coil is decreased (ii) an iron rod is introduced in the coil.

Asked by Topperlearning User 7th July 2015, 2:20 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

Name the phenomenon associated with the production of back emf in a coil due to change of electric current through the coil itself. Name and define the SI unit used for measuring this characteristic of the coil .

Asked by Topperlearning User 7th July 2015, 2:11 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

Derive the formula for the self inductance of a long solenoid.

Asked by Topperlearning User 7th July 2015, 1:43 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

Calculate the mutual inductance of a 1 m long coil with 0.4 m radius and 1000 turns has a secondary of 500 turns wound near its mid-point.

Asked by Topperlearning User 7th July 2015, 1:38 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

Can a wire act as an inductor? Give reason.

Asked by Topperlearning User 7th July 2015, 12:58 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

 Calculate total inductance.

Asked by Topperlearning User 7th July 2015, 12:56 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

What is the difference between self inductance and mutual inductance?

Asked by Topperlearning User 7th July 2015, 11:36 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

Suppose a circular coil and a conductor are kept adjacent to each other in same plane. Calculate the mutual inductance if the radius of circular coil is 'r' with 'n' number of turns kept at distance 'l' from the conductor.

Asked by Topperlearning User 7th July 2015, 11:36 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

 Suppose the two coils with inductance L are connected as shown in the diagram above. Calculate the total self inductance.

Asked by Topperlearning User 7th July 2015, 11:24 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

What will be the effect on self inductance when the number of coils is doubled?

Asked by Topperlearning User 7th July 2015, 11:18 AM
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CBSE - XII Science - Physics - Electromagnetic Induction

How does the mutual inductance of a pair of coils change when (i) the distance between the coils is increased and(ii) the number of turns in each coil is decreased ? Justify your answer in each case.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XII Science - Physics - Electromagnetic Induction

What is coefficient of coupling  given L1 = 4 H , L2 = 4 H , M = 256.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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