Effects of electric current — Flashcards
Maharashtra Board · Class 10 · Science
40 flashcards for Effects of electric current (Maharashtra Board Class 10 Science) to test yourself on key terms and facts.
Interactive on Super Tutor
Studying Effects of electric current? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for flashcards and more.
Free trial, no card needed.
What happens to electrical energy when current flows through a resistor?
Answer
The electrical energy given by the cell is converted into heat energy in the resistor, and the temperature of the resistor increases.
State the formula for electrical power.
Answer
Electrical power = P = V_AB × I, where V_AB is the potential difference and I is the current.
A circuit has a potential difference of 12 V and current of 2 A. Find the electrical power.
Answer
Use P = V_AB × I = 12 V × 2 A = 24 W. The electrical power is 24 W.
How is heat produced in a resistor written in formula form?
Answer
Heat produced is H = P × t = V_AB × I × t.
State Joule's law of heating.
Answer
Joule's law of heating is H = I² × R × t.
A resistor of 5 Ω carries a current of 3 A for 4 s. Find the heat produced.
Answer
Use H = I² × R × t = 3² × 5 × 4 = 9 × 5 × 4 = 180 J. The heat produced is 180 J.
Why is Nichrome used in heating appliances like heaters and cookers?
Answer
Nichrome is an alloy with higher resistivity, so it produces more heat when current flows through it. It is used as a resistor coil in heating appliances.
Why is tungsten used in an electric bulb?
Answer
Tungsten wire gets heated to nearly 3400°C and emits light. That is why it is used in bulbs.
+32 more flashcards
Practise AllFrequently Asked Questions
What are the important topics in Effects of electric current for Maharashtra Board Class 10 Science?
How many flashcards are available for Effects of electric current?
How should I revise Effects of electric current for the Maharashtra Board Class 10 board exam?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Effects of electric current
Practice Quiz
Test yourself with a quick quiz
Important Questions
Exam-style questions with answers
Revision Notes
Key points for last-minute revision
Formula Sheet
The chapter's formulas in one place
Chapter Summary
Understand the chapter at a glance
Concept Maps
See how topics connect
Study Plan
Step-by-step plan for this chapter
Syllabus
What topics to cover
For serious students
Get the full Effects of electric current chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for Maharashtra Board Class 10 Science. Free to start, no card needed.