Current Electricity Exe-9A Very Short Answer Physics Class-9 ICSE Selina Publishers

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 2024-25 academic sessionVisit 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 Physics Class-9 ICSE Selina Publishers

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 2024-2025


Exercise- 9A  Electric Current

Current Electricity Very Short Answer Physics Class-9 ICSE Selina Publishers

Page – 215

VERY SHORT ANSWER TYPE:

Question-1 Name one d.c. source and one a.c. source.

Answer-1 d.c. source: cell, a.c. source: mains.

Question-2 What is an electric cell?

Answer-2 electric cell is a device used to generate electricity, or to make chemical reactions by applying electricity. It converts chemical energy into electrical energy.

Question-3 What transformation of energy takes place when current is drawn from a cell?

Answer-3 Chemical energy changes to electrical energy.

Question-4 Name the constituents of a cell.

Answer-4 Two electrodes and an electrolyte in a vessel.

Question-5 State the two kinds of cell. Give one example of each.

Answer-5 Two kinds of cells are:

1 => Primary cell :  Leclanche cell.

2 =>Secondary cell : Lead (or acid) accumulator.

Question-6 How much is the charge on an electron ?

Answer-6 -1.6 x (10)^-19 coulomb.

Question-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.

Answer-7 The expression for the current in the conductor is (ne/t) as current = charge/ time = (ne/t)

Question-8 Name the instrument used to control current in an electric circuit.

Answer-8 Rheostat is the instrument used to control current in an electric circuit.

Question-9 What is the function of a key (or switch) in an electric circuit?

Answer-9 To put on or off current in a circuit.

Question-10 Select conductors of electricity from the following: Copper wire, silk thread, pure water, acidulated water, human body, glass, mercury.

Answer-10 Copper wire , acidulated water, human body and mercury.

—  end of  Current Electricity Exe-9A Very Short Answer Physics Class-9 ICSE Selina Publishers   :—

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