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QAIPMT-2010-Ph-2057: NEET 2010 Physics - Class 12 AIPMT-2010-Ph-2057 Solution: A potentiometer circuit is set up as shown. The potential…
A potentiometer circuit is set up as shown. The potential gradient across the potentiometer wire is k volt/cm and the ammeter present in the circuit reads 1.0 A when two way key is switched off. The balance points when the key between the terminals (i) 1 and 2 (ii) 1 and 3 is plugged in are found to be at length cm and cm respectively. The magnitudes of the resistors R and X in ohms are then equal respectively to and and and and
Multiple Choice Options
- A _ = 1.33
- B _ = 1.40
- C _ = 1.50
- D _ = 1.25
Step-by-Step Verified Solution
For total internal reflection, sini > sinC
where, i = angle of incidence, C = critical angle
But, sinC = 1 _
_ sini > 1 _
_ _ > 1 sin _ i
_ _ > 1 sin _ 45 _
_ _ > 2