Verified Solution • 2025–26 Session moderate

QAIPMT-2010-Ph-2077: NEET 2010 Physics - Class 12 AIPMT-2010-Ph-2077 Solution: A common emitter amplifier has a voltage gain of 50 an input…

A common emitter amplifier has a voltage gain of 50 an input impedance of 100Ω100\Omega and an output impedance of 200Ω200\Omega. The power gain of the amplifier is 500 1000 1250 50

Multiple Choice Options

  • A μ0qf2πR{{{\mu _0}qf} \over {2\pi R}} 2 � R _ 0 _ q f _
  • B μ0qf2R{{{\mu _0}qf} \over {2R}} 2 R _ 0 _ q f _
  • C μ0q2fR{{{\mu _0}q} \over {2fR}} 2 f R _ 0 _ q _
  • D μ0q2πfR{{{\mu _0}q} \over {2\pi fR}} 2 � f R _ 0 _ q _

Step-by-Step Verified Solution

When the ring rotates about its axis with a uniform frequency f Hz, the current flowing in the ring is I = q T = qf Magnetic field at the centre of the ring is B = _ 0 I 2 R = _ 0 q f 2 R

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