In the opamp circuit shown, the Zener diodes Z1 and Z2 clamp the output voltage V_o to +5 V or -5 V. The switch S is intially closed and is opened at time t = 0

The time t = t_{1 (in seconds) at which Vo changes state is _____.}

In the circuit shown, assume that the opamp is ideal. If the gain ($${V_0}/{V_{in}}$$) is -12, the value of R (in K$$\Omega $$) is _____.

Assuming that the op-amp in the circuit shown below is ideal, the output voltage V₀ (in volts)

For the voltage regulator circuit shown, the input voltage (V_in) is 20V $$ \pm $$ 20% and the regulated output voltage (V_out) is 10 V. Assume the opamp to be ideal . For a load R_L drawing 200 mA, the maximum power dissipation in Q₁ (in Watts) is ______.