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QAIPMT-2010-Ph-2082: NEET 2010 Physics - Class 12 AIPMT-2010-Ph-2082 Solution: A beam of cathode rays is subjected to crossed electric (E) and …

A beam of cathode rays is subjected to crossed electric (E) and magnetic fields (B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by (Where V is the potential difference between cathode and anode) B22VE2\frac{B^2}{2VE^2} 2VB2E2\frac{2VB^2}{E^2} 2VE2B2\frac{2VE^2}{B^2} E22VB2\frac{E^2}{2VB^2}

Multiple Choice Options

  • A 150V, 2.2A
  • B 220V, 2.2A
  • C 220V, 2.0A
  • D 100V, 2.0A

Step-by-Step Verified Solution

As V L = V C = 300 V, resonance will take place _ V R = 220 V Current, I = 220 100 = 2.2 A _ Hence, the reading of the voltmeter V 3 is 220 V and the reading of ammeter A is 2.2 A.

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