3. describe qualitatively the operation of the circuit in fig. 3.3. what is the purpose of r1, r2 and the diodes? what is the purpose of the darlington connections? 4. if the feedback and input resistors of ic2 are 10k and 1k respectively, what is the voltage gain of the circuit in fig. 3.3? 5. what is the output resistance of the circuit? 6. what is the current gain?

hèllo, sorry i really need some more points so if you need this qustion answered than retype it

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg