NEET Physics: Questions 514 - 518 of 2099
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Question number: 514
Question number: 515
Question number: 516
A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10 -7 ohm-meter and the current passing through it is 0.1 ampere; cross-section of the wire is 10 -6 m 2. The potential gradient along the potentiometer wire is
10 -8 V/m
10 -2 V/m
10 -4 V/m
10 -6 V/m
Question number: 517
Question number: 518
How will reading in the ammeter Switch. A be affected if another identical bulb Q is connected in parallel to P as shown in the figure? The voltage in the mains is maintained at constant value
The reading will increase four fold.
The reading will be double of previous one.
The reading will not be affected.
The reading will be reduced to one half.