Understanding Voltage Measurement with Oscilloscopes

What happens to the bright spot on the oscilloscope screen when measuring a direct current with the time base switched off?

• It moves left to right.

• It remains stationary.

• It disappears.

• It blinks rapidly.

How is the peak voltage of an alternating current determined using the Y gain setting?

• By measuring from the left side of the screen.

• By measuring from the top of the screen.

• By measuring from the bottom of the screen.

• By measuring from the center of the screen.

What is observed on the oscilloscope when there is no input signal and the time base is off?

• A dark screen.

• A moving line from left to right.

• A bright spot at the center.

• A blinking light.

How does the time base setting affect the display of an AC signal on the oscilloscope?

• It changes the color of the display.

• It changes the size of the display.

• It alters the brightness of the display.

• It affects the speed of the moving line.

What is the period of a 50 Hz alternating current signal?

• 0.02 seconds

• 0.05 seconds

• 0.10 seconds

• 0.15 seconds

How many divisions are needed for a complete oscillation of a 50 Hz signal with a time base of 5 milliseconds per division?

• 4 divisions

• 8 divisions

• 2 divisions

• 6 divisions

What happens to the display when the frequency of the signal is increased to 25 Hz?

• The display becomes brighter.

• The number of divisions for a complete oscillation increases.

• The display becomes dimmer.

• The number of divisions for a complete oscillation decreases.

How does changing the Y gain to 10 volts affect the oscilloscope display?

• It decreases the brightness.

• It changes the color of the display.

• It increases the brightness.

• It changes the scale of the voltage measurement.

What is the period of a 25 Hz signal?

• 0.06 seconds

• 0.04 seconds

• 0.02 seconds

• 0.08 seconds

How many divisions are required for a complete oscillation of a 25 Hz signal with a time base of 5 milliseconds per division?

• 4 divisions

• 10 divisions

• 6 divisions

• 8 divisions