The following notes are attached to some electrical devices. Which one can you safely ignore?
(A) Danger! One million volts!
(B) Danger! One million amps!
(C) Danger! One million ohms!
The following notes are attached to some electrical devices. Which one can you safely ignore?
(A) Danger! One million volts! --- No.
That could force a large current through you.
The following notes are attached to some electrical devices. Which one can you safely ignore?
(B) Danger! One million amps! --- No.
That much current would not be healthy if it went through you.
The following notes are attached to some electrical devices. Which one can you safely ignore?
(C) Danger! One million ohms! --- Yes
Go ahead and ignore it. It's just a good insulator.
(A) 5V.
(B) 9V.
(C)25V.
(D)27V.
Most devices violate Ohm's Law somewhat. Which of the following electrical devices violates Ohm's Law the most?
(A) Two feet of copper wire.
(B) An insulator.
(C) A diode.
(D) A 4700 ohm resistor.
Most devices violate Ohm's Law somewhat. Which of the following electrical devices violates Ohm's Law the most?
(A) Two feet of copper wire. --- No.
It's resistance would be small but constant.
Most devices violate Ohm's Law somewhat. Which of the following electrical devices violates Ohm's Law the most?
(B) An insulator. --- No.
Its resistance would be very large but constant.
Most devices violate Ohm's Law somewhat. Which of the following electrical devices violates Ohm's Law the most?
(C) A diode. --- Yes.
Resistance high in one direction, low in the other.
Most devices violate Ohm's Law somewhat. Which of the following electrical devices violates Ohm's Law the most?
(D) A 4700 ohm resistor. --- No.
Constant resistance (namely 4700 ohms).
(A) Not even a tingle.
(B) A tingle but no pain.
(C) A painful shock.
(D) Death.
(A) Not even a tingle. --- No.
Assuming 500 ohms gives more than 0.001A.
(B) A tingle but no pain. --- No.
Assuming 500 ohms gives more than 0.001A
(C) A painful shock. --- Yes.
I = 12V/500 = 0.024A > 0.01A
(D) Death. --- No.
Assuming 500 gives less than 0.1A.