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Easy Dual nature of radiation, Photoelectric effect, Hertz and Lenard's observations MCQs for JEE

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Part of Dual Nature of Matter and Radiation in JEE Main Physics.

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Q1PhysicsUnit 17: Dual Nature of Matter and Radiation
The incident photon involved in the photo-electric effect experiment ν>νo\nu>\nu_{o}
Q2PhysicsUnit 17: Dual Nature of Matter and Radiation
The work function of a substance is 4.0 eVe V. The longest wavelength of light that can cause photo-electric emission from this substance is approximately
Q3PhysicsUnit 17: Dual Nature of Matter and Radiation
The sensor is exposed for 0.1s0.1 s to a 200W200 W lamp 10m10 m away. The sensor has opening that is 20 mm in a diameter How many photons enter the sensor if the wavelength of light is 600 mm? (assume that all the energy of the lamp is given off as light).
Q4PhysicsUnit 17: Dual Nature of Matter and Radiation
The photoelectric effect proves that light consists of:
Q5PhysicsUnit 17: Dual Nature of Matter and Radiation
Work function is
Q6PhysicsUnit 17: Dual Nature of Matter and Radiation
Assertion Mass of moving photon varies inversely as the wavelength. Reason Energy of the particle == Mass ×\times (speed of light) 2^{2}
Q7PhysicsUnit 17: Dual Nature of Matter and Radiation
In a photoelectric effect, the anode potential is plotted against the plate current
Q8PhysicsUnit 17: Dual Nature of Matter and Radiation
The creation of voltage or electric current in a material upon exposure to light is termed as

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