Voltage Measuring Device has Non Infinite Resistance (Viva Voce) : Class 12 : Physics : Amrita Online Lab

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Voltage Measuring Device has Non Infinite Resistance

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	1)	Resistance of ideal voltmeter is _____
		Lower Infinite Higher Zero

	2)	Which of the following is not a reason for the high resistance of the voltmeter?
		To reduce error To make current through a voltmeter is negligible To make current through a voltmeter is finite Otherwise voltmeter alters the potential difference that is to be measured

	3)	In the given figure, two resistors of 10 ohms are connected in series and the voltmeter is connected parallel to one of the resistors. What is the resistance of the voltmeter if E=5 V and the voltmeter reading is 2.482 volts?
			689 Ω 500 Ω 1020 Ω 900 Ω

	4)	In the given figure, two resistors of the same value are connected in series and the voltmeter is connected parallel to one of the resistors. If the voltmeter is ideal what will be the voltmeter reading?
			E/2 E/4 2E E/3

	5)	Cell is connected with resistor. What happens when the voltmeter is connected in series in the circuit?
		Current in the circuit decreases Voltmeter measures potential differences correctly Current in circuit increases Resistance in the circuit decreases

	6)	In the given figure, two resistors of the same value are connected in series and the voltmeter is connected parallel to one of the resistors. If the voltmeter is non-ideal what will be voltmeter reading?
			V greater than E None of these V less than E V less than or equal to E

	7)	Why voltmeter is connected in parallel in the circuit?
		Voltmeter allows current due to its low resistance when it is connected in parallel Current through the voltmeter increases when it is connected in series, it will affect the circuit None of these Voltmeter does not allow current due to its high resistance when it is connected in parallel

	8)	Which one of the voltmeters you will select for accurate measurement of potential difference?
		Voltmeter of resistance 500 Ω Voltmeter of resistance 1000 Ω Voltmeter of resistance 100000 Ω Voltmeter of resistance 750 Ω

	9)	Cell is connected to the resistance of R. Voltmeter is connected parallel to resistance R. If V is the voltmeter reading, E is the Voltage of the cell and R is the resistance, what will be the resistance of the voltmeter?
		R(V-E)/E R/(V-E)E E/(V-E)R RE/(V-E)

	10)	In the given figure, two resistors of 15 ohms are connected in series and the voltmeter is connected parallel to one of the resistors. What is the voltmeter reading if E=10 V and the resistance of the voltmeter is 1000 ohms?
			4.962 volts 2.564 volts 7.267 volts 1.266 volt

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