What is the effect of current flowing in the same direction in two long straight and parallel conductors? Give the definition of ‘ampere’ based on this effect.

Solution

In two long parallel straight conductors, when the current is flowing across the wires in the same direction, they attract each other. i.e, parallel currents attract.

One ampere is the value of that steady current which, when maintained in each of the two very long, straight, parallel conductors of negligible cross-section, and placed one metre apart in vacuum, would produce on each of the conductors a force equal to $2 \times 10^{7}$ newtons per metre of length.

Some More Questions From Moving Charges And Magnetism Chapter

Two moving coil meters, M₁ and M₂ have the following particulars:
R₁ = 10 Ω N₁ = 30,
A₁ = 3.6 x 10^–3 m², B₁ = 0.25 T
R₂ = 14 Ω; N₂ = 42,
A₂ = 1.8 x 10^–3 m², B₂ = 0.50 T
(The spring constants k are identical for the two meters).
Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of M₂ and M_1.

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Moving Charges And Magnetism

What is the effect of current flowing in the same direction in two long straight and parallel conductors? Give the definition of ‘ampere’ based on this effect.

Some More Questions From Moving Charges And Magnetism Chapter

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