Current Electricity Exe-9A Very Short Answer Physics Class-9 ICSE Selina Publishers. There is the solutions of Very short Answer type Questions of your latest textbook which is applicable in 2025-26 academic session. Visit official Website CISCE for detail information about ICSE Board Class-9 current electricity class 9 questions and answers pdf .
Current Electricity Exe-9A Very Short Answer Type
Physics Class-9 ICSE Selina Publishers
| Board | ICSE |
| Class | 9 |
| Subject | Physics |
| Writer / Publication | Concise selina Publishers |
| Chapter-9 | Current Electricity |
| Exe-9A | Electric Current |
| Topics | Solution of Exe-9(A) Very Short Answer Type |
| Academic Session | 2025-2026 |
Exercise- 9A Electric Current
Current Electricity Very Short Answer Physics Class-9 ICSE Selina Publishers
Page – 215
VERY SHORT ANSWER TYPE:
Que-1: Name one d.c. source and one a.c. source.
Ans: d.c. source: cell, a.c. source: mains.
Que-2: What is an electric cell?
Ans: electric cell is a device used to generate electricity, or to make chemical reactions by applying electricity. It converts chemical energy into electrical energy.
Que-3: What transformation of energy takes place when current is drawn from a cell?
Ans: Chemical energy changes to electrical energy.
Que-4: Name the constituents of a cell.
Ans: Two electrodes and an electrolyte in a vessel.
Que-5: State the two kinds of cell. Give one example of each.
Ans: Two kinds of cells are:
1. Primary cell : Leclanche cell.
2. Secondary cell : Lead (or acid) accumulator.
Que-6: How much is the charge on an electron ?
Ans: -1.6 x (10)^-19 coulomb.
Que-7: n electrons flow through a cross section of a conductor in time t. If charge on an electron is e, write an expression for the current in the conductor.
Ans: The expression for the current in the conductor is (ne/t) as current = charge/ time = (ne/t)
Que-8: Name the instrument used to control current in an electric circuit.
Ans: Rheostat is the instrument used to control current in an electric circuit.
Que-9: What is the function of a key (or switch) in an electric circuit?
Ans: To put on or off current in a circuit.
Que-10: Select conductors of electricity from the following: Copper wire, silk thread, pure water, acidulated water, human body, glass, mercury.
Ans: Copper wire , acidulated water, human body and mercury.
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