current flows from high to low potential if you connect a source to a circuit within the circuit itself high potential is at less electron and low potential at more electron
force (due to current in XXX) acts in XXX direction in order to oppose the motion of the XXX Using flemming’s left hand rule the direction of current is from XXXX to XXXX Current flows from - to + inside an e.m.f. source so XXX is at a higher potential
ferrous core increases magnetic flux density
velocity selector: electric field applied vertically downwards electric force on particle in oppositte direction to magnetic field particle undeflected when magnitudes magnitudes magnitues magneiu ofe
electric field is vertically downwards For particle to be undeflected magnetic field should be vertically upwars since particle is positively charged, current is in same direction of motion therefore to the right using fleming’s left hand rule magnet
V=u + at, starts from rest so u=0, V=at, uniform acceleration so V propto t. From graph E propto t since straight line passing through orign. E propto t t propto v therefore Eprotp v
Important
wire inside wire field
The distance decreases. The current in the turns gives rise to concentric magnetic fields around the turns. Turns sit within the magnetic field of adjacent turns. The current flowing in one turn is perpendicular to the magnetic field from adjacent turns. A current carrying conductor in a magnetic field experiences a force. from flemming’s left hand rule the force is towards each other.
do not simply state fleming’s left hand rule