Resistance and Power Questions and Answers
Resistance and Power questions with answers are essential for electronics and electrical engineering students preparing for GATE, DRDO, ISRO, and other technical exams. Understanding the relationship between current, voltage, and resistance helps in analyzing and designing efficient electrical circuits. This topic covers Ohm’s law, power dissipation, resistivity, and network theorems with clear explanations and practical examples. These programming-style electronics MCQs help learners apply theoretical knowledge to real-world problems. Practice these Resistance and Power questions and answers to strengthen your technical fundamentals and boost your exam confidence.
Resistance and Power
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72 questions
1. How do fixed resistors usually fail?
- slowly over time
- by increasing their value
- by becoming an open circuit
- by increasing their value and becoming an open circuit
2. With Ohm's law, if voltage increases and resistance stays the same:
- current remains the same
- power decreases
- current increases
- resistance decreases
3. Which formula shows a direct proportionality between power and voltage?
- V = IR
- P = VI
- P = IR
- I = V/R
4. With 1 mA of current, what wattage rating should a 470 ohm resistor have?
- 1/4 watt
- 1/2 watt
- 1 watt
- 2 watts
5. How is a 3.9 komega.gif resistor color-coded?
- red, white, red, gold
- red, green, orange, silver
- orange, white, red, gold
- orange, green, orange, silver
6. What resistor type is found in SIPs and DIPs?
- metal film
- wirewound
- metal oxide
- thick film
8. What are the two major categories for resistors?
- low and high ohmic value
- commercial and industrial
- low and high power value
- fixed and variable
10. The six basic forms of energy are:
- light, sun, magnetic, chemical, electrical, and mechanical
- electrical, mechanical, light, heat, magnetic, and chemical
- electrical, mechanical, sun, heat, chemical, and light
- potential, sun, light, chemical, electrical, and mechanical