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Two voltmeters have the same range of 0-400 V and have an internal impedance of 30,000 ohms and 20,000 ohms respectively. If they are connected in series and 600 V is applied across the series circuit, the voltmeter readings are

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  1. 400 V and 200 V
  2. 300 V and 300 V
  3. 360 V and 240 V
  4. One of the meters is out of the range and the other is 100 V

Answer (Detailed Solution Below)

Option 3 : 360 V and 240 V
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Detailed Solution

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Voltage division Rule:

The voltage across the first voltmeter 

The voltage across the second voltmeter 

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More Basic DC Voltmeter Questions

Q1.In shunt type ammeter, the swamping resistance is connected in series with the meter _______.
Q2.Two voltmeters have the same range of 0-400 V and have an internal impedance of 30,000 ohms and 20,000 ohms respectively. If they are connected in series and 600 V is applied across the series circuit, the voltmeter readings are
Q3.The following have a high electrical resistance and essential in order that the current drawn by them is small and consequently the power absorbed is small.
Q4.Fill in the blank with the CORRECT option: A voltmeter is connected in ______ to the device for measuring its voltage, while an ammeter is connected in ______ with the device to measure its current.
Q5.Two voltmeters are connected in series across 240 V supply. The resistance of voltmeter A and B are 5 kΩ and 10 kΩ, respectively, \(\rm Reading~of~meter~B \over Reading~of~meter~A\)=?
Q6.A voltmeter has a range of 0 - 10 V and an internal resistance of 100 kΩ. How can a single resistor be connected to this voltmeter to extend its range to 0 - 50 V?
Q7.The sensitivity of a voltmeter using 0-5 mA meter movement is
Q8.The sensitivity of a voltmeter, which gives a fullscale deflection for a current of 1 mA, is:
Q9.Two voltmeters are connected in series across 240 V supply. The resistance of voltmeter A and B are 5 kΩ and 10 kΩ respectively. Calculate the voltage across the two voltmeters.
Q10.To increase the voltage range of an analogue voltmeter an additional resistance is added in series with the meter resistance. This additional resistance is called ________.

More Extension Ranges of Basic Meters Questions

Q1.Which of the following is true for extending the range of the DC voltmeter? 
Q2.In shunt type ammeter, the swamping resistance is connected in series with the meter _______.
Q3.A moving coil instrument gives a full scale deflection of 10 mA when the potential difference across its terminals is 100 mV. Calculate the shunt resistance for full scale deflection which corresponds to 200 A?
Q4.The range of a moving iron ammeter can be extended by using a ___________.
Q5.A 10 - mA meter with an internal resistance of 50 Ω is to be converted into a (0 - 400) mA ammeter. Calculate shunt resistance required.
Q6.The instrument used to measure electric current is: 
Q7.The range of an ammeter can be extended by using: 
Q8.A (0 - 100 V) MC voltmeter with the internal resistance of 2 Ω is used to measure voltage up to 200 V. The additional resistance to be connected in series with the voltmeter is:
Q9.Connecting a low resistance in parallel to the coil circuit of an instrument is used for which of the following applications?
Q10.A 1-mA meter movement with an internal resistance of 100 Ω is to be converted into a 0 to 100 mA range. The value of shunt resistance required is:
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More Electrical and Electronics Measurements Questions

Q1.What determines the length of the delay in an electrical delay line used in oscilloscopes?
Q2.The time delay in an oscilloscope can be measured by:
Q3.Why is shielding used in oscilloscope probes?
Q4.Which of the following instruments typically has the highest resolution?
Q5.In a CRT oscilloscope, the horizontal deflection plates are used to:
Q6.In a multiple trace oscilloscope, the display of two signals is achieved by:
Q7.Why is a delay line used in an oscilloscope?
Q8.Which of the following defines accuracy in measurement?
Q9.In a Cathode Ray Oscilloscope (CRO), how is a time delay measured?
Q10.What is the primary purpose of the graticule in an oscilloscope screen?
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