Science Answer the questions.[Phy-3M]

i. a. Right hand thumb rule will determine the direction of a magnetic field around a straight conductor carrying current.
b. Fleming's left had rule will determine the direction of a force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it.
c. Fleming's right hand rule will determine the direction of current induced in a coil due to its rotation in a magnetic field.
ii. a. The right-hand thumb rule is used to find the directions of the magnetic field around a current-carrying straight conductor.
b. Fleming's left-hand rule (motor rule): helps in understanding the direction of the magnetic force acting on a conductor.
c. Fleming's right-hand rule (dynamo rule) helps in understanding the direction of induced current when a conductor moves in a magnetic field.

This is because of scattering of light near the horizon, most of the blue light and shorter wavelengths are scattered away by the particles present in the atmosphere during sunrise and sunset. So, the light that reaches our eyes is of longer wavelength (e.g. red). This gives rise to the reddish appearance of the sky. But during the day sun appears white as sun is near the surface of earth nearly overhead, thus the sunlight passes through much smaller distance and thus the scattering is much less and sun appears white.

i. 1. The force acting on a current-carrying conductor placed perpendicular to a magnetic field increases with the increase in the current flowing through a conductor.
2. When a horseshoe magnet is replaced by a stronger magnet, then the magnetic field increases. Thus, the force acting on the conductor increases.
3. If the length of the conductor increases then the force acting on the conductor also increases.
ii. Fleming's left hand rule: Stretch the forefinger, middle finger and the thumb of your left hand mutually perpendicular to each other. If the forefinger indicates the direction of magnetic field and the middle finger indicates the direction of current, then the thumb will indicate the direction of motion of conductor.