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CBSE Class 12-science Answered

Is the steady electric current the only source of magnetic field .give reason
Asked by Rajeev | 21 Feb, 2016, 11:43: PM
answered-by-expert Expert Answer
The source of magnetic field is a current element or moving charge.
So, the steady electric current is the source of magnetic field. 
Answered by Yashvanti Jain | 22 Feb, 2016, 07:55: PM

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CBSE 12-science - Physics
Answer this:  Assertion (A): When radius of a circular loop carrying a steady current is doubled, its magnetic moment becomes four times.  Reason (R): The magnetic moment of a circular loop carrying a steady current is proportional to the area of the loop.  Select the correct answer from the codes (a), (b), (c) and (d) as given belote.  (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).  (b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).  (c) Assertion (A) is true, but Reason (R) is false.  (d) Assertion (A) is false and Reason (R) is also false.
Asked by anubhutiupadhaya | 06 Mar, 2023, 04:23: PM
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CBSE 12-science - Physics
PLEASE SOLVE IT
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Asked by rd0543293 | 19 Jun, 2022, 10:51: AM
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CBSE 12-science - Physics
Please refer to the uploaded image for the doubt
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Asked by arjunsah797 | 16 Mar, 2022, 02:07: PM
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CBSE 12-science - Physics
Sir Pl solve questions no 18
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Asked by shobhit | 29 Mar, 2019, 10:54: PM
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CBSE 12-science - Physics
Two wires carrying equal and opposite current are twisted together to reduce magnetic effect. What is the basis for this procedure?
Asked by Topperlearning User | 20 May, 2015, 10:29: AM
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CBSE 12-science - Physics
Two infinitely long parallel conductors carrying current in the same direction tend to attract each other. Derive the expression for the force per unit length.
Asked by Topperlearning User | 20 May, 2015, 10:28: AM
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CBSE 12-science - Physics
Two long parallel straight wires M and N separated by a distance 8 cm in the air carry currents 10 A and 12 A in opposite direction. Calculate the magnitude and direction of the force on a 22 cm length of wire N.
Asked by Topperlearning User | 20 May, 2015, 10:27: AM
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CBSE 12-science - Physics
What will happen if two linear current carrying conductors of unequal length are held parallel to each other?
Asked by Topperlearning User | 20 May, 2015, 10:25: AM
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CBSE 12-science - Physics
Two charges 5 C and 8 C separated by a distance of 10 cm are moving with velocity 15 m/s and 20 m/s respectively. What is the magnitude of force acting between these two charges? 
Asked by Topperlearning User | 20 May, 2015, 01:31: PM
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CBSE 12-science - Physics
If two long parallel wires are suspended freely. What would be the effect if they are connected to a battery a) In series b) In parallel
Asked by Topperlearning User | 20 May, 2015, 01:33: PM
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