Related InterviewSolutions

• A large number of 230 Ω resistors are obtained by combining 120 Ω resistors with a standard deviation of 4.0 Ω and 110 Ω resistors with a standard deviation of 3.0 Ω. The standard deviation of the 230 Ω resistors thus formed will be
• Two 100 V full scale PMMC type dc voltmeter having figure of merits (FOM) of 10kΩ/V and 20kΩ/V are connected in series. The series combination can be used to measure a maximum DC voltage of ____V.150
• An LPF wattmeter of power factor 0.2 is having three voltage settings 300 V, 150 V and 75 V, and two current settings 5A and 10 A. The full scale reading is 150. If the wattmeter is used with 150 V voltage setting and 10 A current setting, the multiplying factor of the wattmeter is 2
• Consider the AC bridge shown below. If ωRC=1 and ΔC/C<0.01, then the ratio ∣∣∣V0Vs∣∣∣ is approximately equal to
• A signal is applied at the input terminals of the circuit shown below. To attenuate the input signal by a factor of 10. The values of R1,C1 respectively are
• A symmetrical three-phase three-wire RYB system is connected to a balanced delta-connected load. The RMS values of the line current and line-to-line voltage are 10 A and 400 V respectively. The power in the system is measured using the two wattmeter method. The first wattmeter connected between R-line and Y-line reads zero. The reading of the second wattmeter (connected between B-line and Y-line) in watt is 3464.1
• A moving coil instrument having a resistance of 10Ω, gives a full-scale deflection when the current is 10 mA. What should be the value of the series resistance, so that it can be used as a voltmeter for measuring potential difference up to 100 V?
• A 4 kΩ, 0.02 W potetiometer is used in the circuit shown below. The minimum value of the resistance Rs in order to protect the potentiometer is
• The two signals S1 and S2, shown in figure, are applied to Y and X deflection plates of an oscilloscope.The waveform displayed on the screen is
• The simultaneous application of signals x(t) and y(t) to the horizontal and vertical plates, respectively, of an oscilloscope, produces a vertical figure-of-8 display. If P and Q are constants and x(t)=Psin(4t+30), then y(t) is equal to