If the resistance of a conductor is doubled, the current gets halved. This is because:
Choose the correct mirror image of the problem figure when the mirror is placed to the right of the figure.
Problem Figure:
Answer Figures:
If a body takes 't' seconds to go once round the circular path of radius 'r', the velocity 'v' is given by:
v = \(\frac{t}{2\pi r}\)
v = \(\frac{\pi r}{2t}\)
v = \(\frac{2\pi r}{t}\)
v = \(\frac{2\pi r^2}{t}\)