To determine which probe can be used to measure a voltage of 60V using an oscilloscope (CRO) with a maximum input of 10V, we need to understand the concept of a probe attenuation factor.
A probe attenuation factor is used to reduce the voltage seen by the oscilloscope. The most common types are:
- 1x probe: No attenuation, the CRO sees the full voltage.
- 10x probe: Voltage is attenuated by a factor of 10. If the input voltage is 60V, the CRO will only see 6V.
- 30x probe: Voltage is attenuated by a factor of 30. A 60V input would be reduced to 2V by the time it reaches the CRO.
- 1000x probe: Voltage is attenuated by a factor of 1000, reducing a 60V input to 0.06V.
Given that the maximum input voltage the CRO can handle is 10V, we need a probe that reduces 60V to less than or equal to 10V. The 10x probe attenuates the voltage by a factor of 10:
\(V_{\text{CRO}} = \frac{V_{\text{input}}}{\text{attenuation factor}} = \frac{60 \, \text{V}}{10} = 6 \, \text{V}\)
This output of 6V is within the safe input range for the CRO (10V maximum). Let's evaluate the options:
- 1x: Not suitable, as 60V would directly pass to the CRO, which exceeds its limit.
- 10x: Suitable, as it reduces 60V to 6V.
- 30x: Suitable but more attenuation than necessary, reducing to 2V.
- 1000x: Not practical for this instance as it overly attenuates the signal to 0.06V.
Therefore, the correct answer is 10x, as it reduces the voltage to a level within the CRO's limit without unnecessary attenuation.
Similar Questions
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Important Questions from Cathode Ray Oscilloscope
Calculate the maximum velocity of the beam of electrons in a CRT having a cathode and anode voltage of 182 V. Assume that the electrons leave the cathode with zero velocity. (Charge of electron = 1.6 × 10-19 C and mass of electron = 9.1 × 10-31 kg)
Which of the following expression is the correct formulae for the deflection sensitivity ‘S’ of a CRT, if
D = deflection on the fluorescent screen
L = distance from the center of the deflection plates to the screen
Ld = effective length of the deflection plates
d = distances between the deflection plates
Ed = Potential between deflecting plates
Ea = accelerating voltageTrigger pulses in CRO are used -
- A Lissajous pattern obtained on a CRO screen is a straight line. The frequencies of the two signals are
Which element in CRO is used to collect secondary emission electrons?
