Answer:
Current in the wire is given as

Explanation:
magnetic field due to long current carrying wire is given as

so we have magnetic force on moving charge is given as

so we have

so we have


Answer:
no you would not hear an echo if you shouted in your bedroom
Explanation:
Echo is a sound produced when the original sound is reflected by walls of a given room. ... So for the case of a bedroom, no echo is produced because there are stuff and the furniture block the sound from reaching the wall hence no bouncing back of sound.
so sorry if i'm wrong :)
The law of conservation of ENERGY
Answer:
1100Joules
Explanation:
Workdone = force x distance
Force= 500N
Distance = 2.2m
So, workdone = 500 x 2.2
= 1100Joules