#5 | Field due to Circle, Semi Circle & Arc
(Physics) > Moving Charges and Magnetism
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Related Practice Questions :

Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing in them are 3I and 4I respectively. The resultant magnetic field induction at the center is :

1.  μ0Iπ 

2.  5μ0I2R 

3.  7μ0I2R 

4.   Zero

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A current wire is hidden in a wall. Its position can be located with the help of a 

1.  Moving coil galvanometer

2.  Voltmeter 

3.  Hotwire ammeter

4.  Magnetic needle

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Which of the following graph correctly represents the variation of magnetic field induction with distance due to a thin wire carrying current?

1.       

2. 

3.         

4.  

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A circular coil of radius R is carrying a certain current. At a point of its axis at distance x fromcenter the value of magnetic field is found to be 122 times the magnetic field at its center.The value of x must be:

1.  R

2.  2R

3.  3R

4.  R2

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The magnetic dipole moment of the given loop is 

                 

1.  52πR2I  

2.  3πR2I  

3.  32πR2I  

4.  5πR2I

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