Question
Using the concept of force between two infinitely long parallel current carrying conductors, define one ampere of current.
✓
Answer
Definition: One ampere is the value of 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 vaccum, would produce on each of these conductors a force equal of 2 x 10-7 N/m of its length.
Alternate Answer
If the student writes $\text{F} = \frac{\mu_{o}}{2\pi}\frac{\text{I}_{1}\text{I}_{2}}{\text{R}}\text{L}$
and says that when $I_1= I_2= 1$ ampere
$R = 1$ meter and $L = 1$ meter, then
$F= 2 x 10^{-7}\ N$
Alternate Answer
Alternate Answer
If the student writes $\text{F} = \frac{\mu_{o}}{2\pi}\frac{\text{I}_{1}\text{I}_{2}}{\text{R}}\text{L}$
and says that when $I_1= I_2= 1$ ampere
$R = 1$ meter and $L = 1$ meter, then
$F= 2 x 10^{-7}\ N$
Alternate Answer
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A laser light is focused by a converging lens. Will there be a significant chromatic aberration?
Name the junction diode whose I-V characteristics are drawn below:
If a constant force acts on a particle, its acceleration will:
- Remain constant.
- Gradually decrease.
- Gradually increase.
- Be undefined.
In the case of forward bias, the P end of a $P - N$ junction diode is connected to which terminal of the battery?
→Answer the following questions:
Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetisation of a ferromagnet?
Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetisation of a ferromagnet?
If the sum of all the forces acting on a body is zero, is it necessarily in equilibrium? If the sum of all the forces on a particle is zero, is it necessarily in equilibrium?
A long solenoid is fabricated by closely winding a wire of radius 0.5mm over a cylindrical nonmagnetic frame so that the successive turns nearly touch each other. What would be the magnetic field B at the centre of the solenoid if it carries a current of 5A?
Electric current is flowing in north direction in an electric line. What will be direction of magnetic field due to electric current above the line?
A convex lens whose refractive index is $n_2$, immersed in a liquid whose refractive index is $n_1,\left(n_2>n_1\right)$. What will be the difference in the working style?
→How do we get energy from the Sun?