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
32. What are the parts of a rheostat?
- wiper and resistor track
- solenoid and armature
- contact and wire wound
- center tape and wiper
33. The load resistance increases. How will the load current change?
- vary
- remain constant
- increase
- decrease
34. What is the power dissipated by a 1.2 komega.gif resistor with 12 volts across it?
- 12 A
- 1.2 A
- 12 A
- 12 mA
35. How many joules of energy will a 10 W lamp dissipate in one minute?
- 10 joules
- 60 joules
- 600 joules
- 3600 joules
36. Which type of test equipment is used to measure resistors?
- ohmmeter
- ammeter
- voltmeter
- watt meter
37. Resistance is:
- the opposition to current flow accompanied by the dissipation of heat
- symbolized by R, measured in ohms, and directly proportional to conductance
- directly proportional to current and voltage
- represented by the flow of fluid in the fluid circuit
38. Electrical equipment is protected against excessive current by a(n):
- fusible wire link
- insulated glass container
- metal ended coil
- circuit opener
39. If resistance decreases, then current will:
- decrease
- increase
- remain the same
- double
40. A wire with a smaller cross-sectional area will produce:
- less heat
- more conductance
- less resistance
- more heat