AC voltage generation

What happens to the output voltage as the coil in a simple electrical alternator rotates through 360°?

• It remains constant.

• It rises to a peak value and then falls to 0 V.

• It decreases steadily.

• It stays at 0 V.

What does the cycle do after reaching 0 V in an alternator?

• Stops completely

• Repeats in the opposite direction

• Continues in the same direction

• Reaches a negative peak

What is the main function of a single-loop AC generator?

• Convert electrical energy to mechanical energy

• Convert mechanical energy to electrical energy

• Store electrical energy

• Convert AC to DC

In the diagram of a single-loop AC generator, what do the letters 'N' and 'S' represent?

• North and South poles of a magnet

• Negative and positive charges

• Nodes and sources

• Neutral and static points

What is the significance of the arrows labeled 'B' in the diagram of a single-loop AC generator?

• They indicate the direction of current flow

• They show the direction of the magnetic field

• They represent the speed of rotation

• They denote the voltage level

What is the primary energy conversion in a single-loop AC generator?

• Electrical to thermal

• Mechanical to electrical

• Chemical to electrical

• Thermal to mechanical

What is the formula to find the frequency of the generated signal in a single-loop AC generator?

• f = N + P

• f = N × P

• f = N / P

• f = P - N

How is the speed of rotation 'N' measured in the context of a single-loop AC generator?

• Meters per second

• Revolutions per minute

• Revolutions per second

• Kilometers per hour

What is the effect on frequency if the speed of rotation is increased while the number of pole pairs remains constant?

• Frequency decreases

• Frequency remains the same

• Frequency increases

• Frequency becomes zero

Which trigonometric function is used in the formula for induced emf?

• Cosine

• Sine

• Tangent

• Cotangent