 can any help answer these qs
can any one help i have 20 or so of ach type qs to do i just need the be shown how to do each one these 7 qs with fulll working out so i can see exactly how each formal works and why i keep geting these qs wrong
thank u in advance for ur help alex
1. The cables on a cable try develop between them amegnetic flux denstity of 0.5 tesla calculate the force exerted on 25 meters of a new cable being installed on thetry if it carries a current of 60 amps
2.A solenoid has burnt out coil which needs to be rewound .the specifications plate on the solenoid states that the coil draws 300ma when operating under normal conditions and that it produces a magnetising force of 2000 at/m. the magnetic core os the soleniod is 51 mm long
calculate the number of turns of wire requird to repair the soleniod
3. using the following information calculate the number of turns on the coil of a contactor
magnetic flux increase from0 to8 mWb in 5 milliseconds
average induced voltage is 200 volts
4. calculate the inductance of a soleniod coil of 1600 turns of copper wire.the change in the magnetic field is measured to be an average of 0.05 mWb when the current fluctuates 5mA and 15 mA .show all working out
5. A large inductor used to limit current has an inductance of 2.2 henrys calculate the voltage indcude in the inductor given that the change in inductor current is 10 amperes over a period of 2 millieseconds
6. calculate the time cconstant of aniductive circuit of a fluresent light if the ballest inductance is 1.1 henry and its resistance is 40 ohm
show all working out
7. The armature conductor of a 15 kwdc generator is 19 meters long when the armature is rotated through magnetic field 1.1 tesla the indcuded voltage is found to be 235 volts dc
what is the velocity of the conductor .  | 
Linear Mode
