Cici uses a long extension cord to plug a lamp in a wall outlet in the next room . what effect will the extension cord have on the circuit a it will decrease the resistance of the circuit b it will increase the voltage of the outlet c it will increase the resistance in the circuit d it will decrease the voltage of the outlet

C. it will increase the resistance in the circuit

Explanation:

The resistance depends on the length (L), the material ( resistivity,ρ)  and the area of cross section (A) of the component added to the circuit.

When the extension cord is added to the circuit in order to connect the lamp. The length of the cord increases the resistance in the circuit. More the length of the extension cord, more would be the resistance.

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:

there are no atoms