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QAIPMT-2010-Ph-2085: NEET 2010 Physics - Class 12 AIPMT-2010-Ph-2085 Solution: The potential difference that must be applied to stop the…
The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface having work functions 5.01 eV when ultraviolet light of 200 nm falls on it must be 2.4 V -1.2 V -2.4 V 1.2 V
Multiple Choice Options
- A 2 � _ V
- B � _ V
- C 2 � _ _ V
- D 2 _ V
Step-by-Step Verified Solution
Constant rate at which radius of the loop shrinks
d r d t = 1 _ 10 _ 3 m s -1
Magnetic flux linked with the loop is
_ = BAcos _ = B( � r 2 )cos0 o = B � r 2
The magnitude of the induced emf is
|e| = d _ d t = d d t ( B � r 2 ) = B � 2 r d r d t
= 0.025 _ � _ 2 _ 2 _ 10 -2 _ 1 _ 10 -3
= � _ 10 -6 V
= � _ V