Which of the following is better for measuring a very small resistance? 

In an A.C circuit, the instantaneous current is 7A. What is the root mean square(r.m.s) value of the current I\(_{r.m.s}\)

Calculate the depth of a swimming pool if the apparent depth is 10cm(refractive index of water is 1.33)

A 5 \(\mu\) positively charged particle is moving at 45º to the direction of magnetic field with 3 x 10\(^4\)m/s speed. If it experiences a force of 6N, what is the value of the flux density of the field?

The dimensional symbol of tension in a string is expressed as