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

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