NEET Physics: Questions 470 - 473 of 2099
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Question number: 470
A potentiometer of longer length is used for accurate measurement.
The potential gradient for a potentiometer of longer length with a given source of emf becomes small.
|a.||Ꭺ is true but Ꭱ is false|
|b.||Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ|
|c.||Ꭺ is false but Ꭱ is true|
|d.||Both Ꭺ and Ꭱ are false|
Question number: 471
Which of the following statements are correct?
- Voltmeter should have high resistance.
- Ammeter should have low resistance.
- Voltmeter is placed in parallel across the conductor in a circuit.
- Ammeter is placed in parallel across the conductor in a circuit.
Select the correct answers and mark it according to the following codes:
1 and 2
2 and 4
1, 2 and 3
1 and 3
A battery is connected to a potentiometer obtained at 84 cm along the wire. When a resistance of 5Ω is connected as a shunt with the cell, the balance point is obtained at 70 cm.
Question number: 472 (1 of 3 Based on Passage) Show Passage
Question number: 473 (2 of 3 Based on Passage) Show Passage
How can we change a galvanometer with R g = 20.0 Ω and I g = 0.00100 A into a voltmeter with a maximum range of 10.0 V?
By adding a resistance 8890 Ω in series with the galvanometer
By adding a resistance 8890 Ω in parallel with the galvanometer
By adding a resistance 9980 Ω . in parallel with the galvanometer
By adding a resistance 9980 Ω in series with the galvanometer