You measure the current in an RC circuit and observe that it is exponentially de

Question

You measure the current in an RC circuit and observe that it is exponentially decaying. You can conclude that the capacitor must:

A) this is not possible

B) discharging

C) charging or discharging

D) charging

The answer isn't charging or discharging.

What's the minimum threshold for often fatal heart fibrillation due to electricity?

A) 100 mA (AC), 500 mA (DC)

B) 310 Ohms (AC or DC)

C) 120 Volts (AC), 240 Volts (DC)

D) 310 Ohms (AC), 290 Ohms (DC)

E) 15 mc (AC), 60 mA (DC)

F) 120 Volts (DC), 240 Volts (AC)

The answer isn't F or C.

Many electrical plugs & outlets are "polarized", where one of the two connecters is larger than the other one. What statement below best describes these two connectors?

A) The larger one is the hot one (at 120 V), the smaller one is neutral (at ground - i.e., 0 V)

B) The smaller one is the ground wire that is there as a safety feature in case there is faulty wiring in the device; the larger one is hot (120 V)

C) Both wires are identical - the size difference is just there to make sure you don't plug it in upside-down.

D) The larger one is the ground wire that is there as a safety feature in case there is faulty wiring in the device; the smaller one is hot (120 V)

E) The larger one is the neutral one (at ground - i.e., 0 V), the smaller one is the hot one (at 120 V)

The answer isn't D or A.

Explanation / Answer

1.

in this case, the capacitor must be charging. therefore, option D is correct.

2. 100 mA (AC), 500 mA (DC) so option A is correct.

3. The larger one is the ground wire that is there as a safety feature in case there is faulty wiring in the device; the smaller one is hot (120 V)

option D is correct

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