# Consider the signal Vmsin 100t 2Vm sin 200t to be sampled and stored in a data acquisition system. The same is to be extracted off-line later on. In order to extract the signal effectively, the original sampling frequency has to be

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Explanation :
No Explanation available for this question

# What is the effect of inductance in the pressure coil on performance of a dynamometer type wattmeter

1.  reads low on lagging power factor and high on leading power factor

2.  It reads high on lagging power factor and low on - leading power factor

3.  Its reading is not affected at all

4

It reads high on lagging power factor and low on - leading power factor

Explanation :
No Explanation available for this question

# The maximum temperature rise of a transformer is 500C. It attains a temperature of 31.60 hour. What is its thermal time constant

1.  2 hour

2.  1/2 hour

3.  1 hour

4.  1/4 hours

4

1/2 hour

Explanation :
No Explanation available for this question

# A moving-coil instrument gives full-scale deflection for 1 mA and has a resistance of 5Ω. If a resistance of 0.55Ω is connected in parallel to the instrument what is the maximum value of current it can measure

1.  5 mA

2.  10 mA

3.  50 mA

4.  100 mA

4

10 mA

Explanation :
No Explanation available for this question

# A single slide wire is used for the measurement of current in a circuit. The voltage drop across a standard resistance of 1.0Ω. is balanced at 70 cm. What is the magnitude of the if the standard cell having an e.m.f. of 1.45 volts is balanced at 50 cm

1.  3.09 A

2.  2.65 A

3.  2.03 A

4.  1.45A

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2.03 A

Explanation :
No Explanation available for this question

# A sinusoidal voltage of 1 V r.m.s. value at 10 Hz is applied across the two terminals of a PMMC type of voltmeter. What is the deflection of the pointer

1.  Zero volt

2.  1 volt

3.  5 volts

4.  The pointer oscillates around zero volt

4

Zero volt

Explanation :
No Explanation available for this question

# Which one of the following is the correct statement Due to inductance in the pressure coil the dynamometer wattmeter

3.  reading is not affected at all

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Explanation :
No Explanation available for this question

# A waveform shown in the figure, is fed to a.d.c. ammeter. What is the reading shown by the meter

1.  Zero

2.  50mA

3.  75mA

4.  100 mA

4

50mA

Explanation :
No Explanation available for this question

# The oscilloscope has an input capacitance of 50 pF and a resistance of 2 MΩ and the voltage divider ratio (k) of 10. What are the parameters of a high-impedance Probe

1.  C1= 5.55 pF, and R1= 9MΩ

2.  C1= 5.55 pF and R1= 18 MΩ

3.  C1= 3.33 pF and R1= 9 MΩ

4.  C1= 1.11 pF and R1= 18MΩ.

4

C1= 5.55 pF and R1= 18 MΩ

Explanation :
No Explanation available for this question

1.  0.01

2.  0.001

3.  0.1

4.  0.003

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