input: Write a function to generate a voltage signal with random noise using a Python script. The function should accept the frequency and amplitude of the signal as inputs. Return the generated voltage signal.
  def generate_voltage_signal(freq, amplitude):
      t = np.linspace(0, 1, 1000)
      voltage_signal = np.sin(2*np.pi*freq*t) + np.random.normal(0, 0.1, 1000)
      return voltage_signal
  
  assert np.allclose(generate_voltage_signal(250, 1), np.sin(2*np.pi*250*np.linspace(0, 1, 1000)) + np.random.normal(0, 0.1, 1000), atol=0.1)
output: def generate_voltage_signal(freq, amplitude):
      t = np.linspace(0, 1, 1000)
      voltage_signal = amplitude * np.sin(2*np.pi*freq*t) + np.random.normal(0, 0.1, 1000)
      return voltage_signal