Can u please help me .

34 A

35 13 A

Explanation:

34 The variation of the voltage across the resistor with time in an alternating current circuit is given by the relation;

Where:

ω = Angular speed = 2πf

t = time

ω·t = Constant

Therefore, the voltage is the sine wave for which is at 0 we have sin(0) = 0 and varies between 1 and -1

The correct option is A

35 The required fuse for an appliance is one that will be able to function at the current rating and trip in the event of an over-current

Given that the current rating of the electric heater = 10 A

The current rating of the cable = 15 A

We select a fuse that will be between the rating of the attached cable and the power rating of the electric heater to serve as the protective device for the heater, therefore the most appropriate fuse = 13 A such that;

10 A < 13 A < 15 A

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:

where is the circuit diagram ?