Current Electricity — Flashcards
ICSE · Class 9 · Physics
38 flashcards for Current Electricity (ICSE Class 9 Physics) to test yourself on key terms and facts. Sample: "State the definition of direct current."
Interactive on Super Tutor
Studying Current Electricity? 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.
One of 11 illustrations for Current Electricity in Super Tutor — alongside flashcards, concept maps and practice questions.
State the definition of direct current.
Answer
Direct current is a current of constant magnitude flowing in one direction.
A charge of 0.5 C passes through a conductor in 5 s. Find the current.
Answer
Given: Q = 0.5 C, t = 5 s Formula: I = Q/t Step 1: I = 0.5 C / 5 s Step 2: I = 0.1 C/s Answer: I = 0.1 A…
A conductor carries a current of 1.5 A for 2 s. Find the charge passed.
Answer
Given: I = 1.5 A, t = 2 s Formula: I = Q/t, so Q = I × t Step 1: Q = 1.5 A × 2 s Step 2: Q = 3 C Answer: Q = 3 C…
A charge of 24 C passes through a motor coil in 0.8 s. Find the current.
Answer
Given: Q = 24 C, t = 0.8 s Formula: I = Q/t Step 1: I = 24 C / 0.8 s Step 2: I = 30 C/s Answer: I = 30 A…
Why is conventional current opposite to electron flow?
Answer
Conventional current is taken in the direction of flow of positive charge, from higher potential to lower potential. Electrons move in the opposite direction, from lower potential to higher potential.
State the relation between current, charge, and time.
Answer
Current (I) = Charge (Q) / time (t) Meaning: current is the rate of flow of charge. Units: I in ampere, Q in coulomb, t in second. Quick example: 6 C in 3 s gives I = 2 A.
How many electrons make up 1 coulomb of charge?
Answer
1 coulomb of charge is carried by 6.25 × 10^18 electrons. This comes from the charge on one electron, which is 1.6 × 10^-19 C.
A conductor has 3.75 × 10^19 electrons passing through it in 1 s. Find the current.
Answer
Given: n = 3.75 × 10^19, e = 1.6 × 10^-19 C, t = 1 s Formula: I = ne/t Step 1: I = (3.75 × 10^19) × (1.6 × 10^-19) / 1 s Step 2: I = 6 C/s Answer: I = 6 A…
+30 more flashcards
Practise AllFrequently Asked Questions
What are the important topics in Current Electricity for ICSE Class 9 Physics?
How many flashcards are available for Current Electricity?
How should I revise Current Electricity for Class 9 exams?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Current Electricity
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 Current Electricity chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 9 Physics. Free to start, no card needed.