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Which of the following statements about conductive materials is incorrect? 1. Examples of conductive materials include iron, aluminum, and gold. 2. Increasing the voltage applied across a conductor will cause the conductor temperature to inc 3. Current flow in a conductive material is due to the movement of positive and/or negative charges. 4. Charges in a conductor move in response to an electric field.
Which of the following statements about electric current is correct? a. The flow of current is never visible to the naked eye under any circumstances. b. The amount of current flowing in a piece of silver wire with a voltage difference of zero across its two ends is never zero. across the cross-sectional area of a conductor. d. The units of current are Watts per second.
Coulombs Law describes a. Magnetic field surrounding a current-carrying conductor. b. Voltage induced in a coil by a constant magnetic field. C. Electric force exerted on one charged sphere, by another charged sphere. d. Amount of heat generated by high current flow in a resistor.
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Answer #1

1)B

2)A

Current is never visible.However under circumstances when current is high and it may cause ionization and lightning which is visible.

3)C

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