Discussion
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- Question
An atom's atomic number is determined by the number of:
Options- A. neutrons minus protons
- B. protons
- C. electrons
- D. neutrons
- Correct Answer
- protons
- 1. If 60 J of energy are available for every 15 C of charge, what is the voltage?
Options- A. 4 V
- B. 60 V
- C. 15 V
- D. 0.25 V Discuss
- 2. Batteries differ from fuel cells in that
Options- A. a battery is a closed system
- B. a battery uses hydrogen and oxygen to create electricity
- C. a battery uses a polymer electrolyte membrane
- D. none of the above Discuss
- 3. An ammeter is used to measure
Options- A. voltage
- B. current
- C. resistance
- D. All of the above Discuss
- 4. In which states may matter may be found?
Options- A. solid, liquid, or mineral
- B. solid, gas, or liquid
- C. mineral, gas, or liquid
- D. plastic, solid, or gas Discuss
- 5. A switch is a device that:
Options- A. short circuits complex circuits
- B. holds a fuse
- C. has double poles
- D. opens or completes a current path Discuss
- 6. A basic electric circuit is made up of what components?
Options- A. A load, a resistor, and a conductive path for current
- B. A voltage source, a load, and a conductive path for current
- C. A voltage source, a conductive path for current, and a battery
- D. A conductive path for current, a battery, and a copper wire Discuss
- 7. The negative and positive charge symbols are assigned (in that order) to the:
Options- A. proton and electron
- B. electron and proton
- C. atom and nucleus
- D. electron and element Discuss
- 8. Material that consists of a mixture of elements is considered to be:
Options- A. an element
- B. an ion
- C. a compound
- D. a molecule Discuss
- 9. What is the color code for a 220 Ω 5% resistor?
Options- A. Red, Red, Brown, Gold
- B. Orange, Orange, Black, Gold
- C. Red, Red, Black, Gold
- D. Red, Red, Brown, Silver Discuss
- 10. A secondary cell generates dc via chemical activity; a primary cell generates dc:
Options- A. electrically
- B. thermally
- C. optically
- D. chemically Discuss
Voltage and Current problems
Search Results
Correct Answer: 4 V
Correct Answer: a battery is a closed system
Correct Answer: current
Correct Answer: solid, gas, or liquid
Correct Answer: opens or completes a current path
Correct Answer: A voltage source, a load, and a conductive path for current
Correct Answer: electron and proton
Correct Answer: a compound
Correct Answer: Red, Red, Brown, Gold
Explanation:
Resistor colour coding series:
Black 0
Brown 1
Red 2
Orange 3
Yellow 4
Green 5
Blue 6
Violet 7
Gray 8
White 9
None 20%
Silver 10%
Gold 5%
Therefore Red, Red, Brown, Gold
2 2 101 5%
= 22 x 10 = 220 ohm 5% (tolerance).
Correct Answer: chemically
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