An ideal OPAMP circuit with a sinusoidal input is shown in the figure. The 3 dB frequency is the frequency at which the magnitude of the voltage gain decreases by 3 dB from the maximum value. Which of the options is/are correct?

For the operational amplifier circuit shown, the output saturation voltages are $$ \pm \,\,15V$$. The upper and lower threshold voltages for the circuit are, respectively.

The following signal V_i of peak voltage 8V is applied to the non-inverting terminal of an ideal Opamp. The transistor has V_BE = 0.7 V, $$\beta \, = \,100;$$ V_LED = 1.5 V, V_CC = 10V and -V_CC = -10V.

The number of times the LED glows is ______.

Consider the constant current source shown in the figure below. Let $$\beta $$ represent the current gain of the transistor

The load current I₀ through R_L is