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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 and an output impedance of . The power gain of the amplifier is 500 1000 1250 50
Multiple Choice Options
- A 2 � R _ 0 _ q f _
- B 2 R _ 0 _ q f _
- C 2 f R _ 0 _ q _
- D 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