Discussion
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- Question
The removal of a non-neutral subatomic particle converts the atom into a:
Options- A. charged ion
- B. nucleus
- C. heavier element
- D. compound
- Correct Answer
- charged ion
- 1. The charge of one coulomb is equal to:
Options- A. 6.24 x 10?18 electrons
- B. one ampere
- C. one second
- D. 6.24 x 1018 electrons Discuss
- 2. Which is the smallest?
Options- A. atom
- B. proton
- C. neutron
- D. electron Discuss
- 3. A secondary cell generates dc via chemical activity; a primary cell generates dc:
Options- A. electrically
- B. thermally
- C. optically
- D. chemically Discuss
- 4. 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
- 5. 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
- 6. A short circuit will have:
Options- A. a small current flow
- B. a large current flow
- C. no current flow
- D. some current flow Discuss
- 7. Which electronics material opposes the movement of free electrons?
Options- A. Conductor
- B. Insulator
- C. Semiconductor
- D. Element Discuss
- 8. Which of the following statements is true?
Options- A. Unlike charges repel and like charges attract.
- B. Like charges repel and unlike charges attract.
- C. Unlike charges attract and like charges attract.
- D. Like charges repel and unlike charges repel. Discuss
- 9. If the current in a circuit equals 0 A, it is likely that the
Options- A. voltage is too high
- B. resistance is too low
- C. circuit has a short
- D. circuit is open Discuss
- 10. What is a characteristic of a secondary cell?
Options- A. rechargeability
- B. not rechargeable
- C. a dry cell
- D. non-liquid Discuss
Voltage and Current problems
Search Results
Correct Answer: 6.24 x 1018 electrons
Correct Answer: electron
Correct Answer: chemically
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: a compound
Correct Answer: a large current flow
Correct Answer: Insulator
Correct Answer: Like charges repel and unlike charges attract.
Correct Answer: circuit is open
Correct Answer: rechargeability
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