1. A 3.0 cm highlighted cross is placed in front of a biconvex lens, at a distance of 10 cm from the lens. This lens focuses the ray from the sun at 15 cm. The nature of the image from the cross formed with this lens is
1) Real inverted and smaller in size than that of the cross
2) Real, inverted and bigger in size than that of the cross
3) Virtual, upright and bigger in size than that of the cross
4) Virtual, upright and smaller in size than that of the cross
5) None of the above _________________________
2. A certain capacitor is charged to 10 V and then, at T= 0 s, allowed to discharge during a certain capacitor. It takes a time T1/2 for the voltage across the capacitor to reach 5 V. this timeT1/2 can be decreased for this circuit by
1) Decreasing the magnitude of the capacitor's capacitance without charging the resistance of the circuit.
2) Increasing the magnitude of the capacitor's capacitance without charging the resistance of the circuit
3) Increasing the magnitude of both the capacitance of the capacitor and the circuit resistance.
4) Increasing the magnitude of the circuit resistance and the capacitance of the capacitance of the capacitor.
5) None of the above _______________________