Q. A transistor is used in common-emitter mode in an amplifier circuit. When a signal of $10\, mV$ is added to the base-emitter voltage, the base current changes by $10\, \mu A$ and the collector current changes by $1.5 \, mA$. The load resistance is $5 \, k\, \Omega$. The voltage gain of the transistor will be ___
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