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प्रश्न
The work functions for metals A, B and C are 1.92 eV, 2.0 eV and 5.0 eV respectively. The metal/metals which will emit photoelectrons for a radiation of wavelength 4100Å is/are
विकल्प
A only
both A and B
all these metals
none
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उत्तर
both A and B
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