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CBSE Class 12-science Answered

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
answered-by-expert Expert Answer

Two equal and opposite current produce equal and opposite magnetic fields. So their magnetic effects get cancelled.

Answered by | 20 May, 2015, 12:29: 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.
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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
ANSWERED BY EXPERT ANSWERED BY EXPERT
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.
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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? 
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