EASY
AS and A Level
IMPORTANT
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The following questions relate to the graph in Figure

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Determine the frequency of this alternating current.

Important Questions on Alternating Currents

EASY
AS and A Level
IMPORTANT

The following questions relate to the graph in Figure.

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Determine the values of I0 & ω.

EASY
AS and A Level
IMPORTANT

The following questions relate to the graph in Figure.

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(b) Write an equation to represent this alternating current.

EASY
AS and A Level
IMPORTANT

An alternating current, measured in amperes (A), is represented by the equation: I=5.0sin120πt.

(a) Determine the values of I0,ωf & T.

MEDIUM
AS and A Level
IMPORTANT

An alternating current, measured in amperes (A), is represented by the equation: I=5.0sin120πt. Sketch a graph to represent the current.

EASY
AS and A Level
IMPORTANT

An alternating voltage V, in volt V, is represented by the equation:

V=300sin100πT

(a) Determine the values of V0,ω & f for this alternating voltage.

EASY
AS and A Level
IMPORTANT

An alternating voltage V, in volt V, is represented by the equation:

V=300sin100πT

(b) Calculate V when t = 0.002 s. (Remember that 100πt is in radians when you calculate this.)

MEDIUM
AS and A Level
IMPORTANT

An alternating voltage V, in volt V, is represented by the equation V=300sin100πT. Sketch a graph to show two complete cycles of this voltage.

MEDIUM
AS and A Level
IMPORTANT

The Y-sensitivity and time-base settings are 5 V/cm and 10ms/cm. The trace seen on the CRO screen is the one shown in Figure .

Determine the amplitude, period and frequency of the signal applied to the Y-input of the CRO.

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