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
21. If a variable resistor's resistance varies in a nonuniform manner as the shaft is moved, it is considered to be:
- linear
- defective
- not wirewound
- tapered
22. Power is measured in units of:
- joules x charge
- joules/work
- joules x voltage
- joules/time
24. With a complex circuit, a supply source senses:
- open circuit components
- when voltages need to be increased
- only a single resistive connection
- when complex currents are needed
25. Which is the most important step utilized when measuring resistors?
- use the highest possible scale
- keep test leads short
- zero the meter before using
- remove power from the circuit
26. Components designed to oppose the flow of current are called:
- insulators
- conductors
- resistors
- heat exchangers
27. How many amps are used by a 100 watt, 120 volt light bulb?
- 1.2 amps
- 12000 amps
- 830 mA
- 12 amps
28. Resistors are identified as to wattage by:
- size
- color code
- types of materials
- internal construction
29. What type of resistors have a tolerance rating of 5% or greater?
- precision
- SIP
- general-purpose
- wirewound
30. Resistor tolerance is either printed on the component, or is provided by:
- keyed containers
- size
- color code
- ohmmeter reading