Aresistor is connected to a 3.0 battery. the power dissipated in the resistor is 4.0 a second, identical resistor is connected in series with the first. how much power is dissipated in one of the resistors now?

Power dissipated across any resistance is given by

now it is given that when one resistance of value 3 ohm connected the power dissipated is 4 Watt

now another identical resistance of same value is connected then the current will reduce to half of its initial value.

now power across any one resistance is given by

So now we will have

So now the power will become 1/4 times of initial power

So now the power will be

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

dang that balls went far