(i) Name an instrument that measures electric current in a circuit. Define unit of electric current.

Answer

An instrument that measures electric current in a circuit is an Ammeter.

The current is said to be one ampere if 1 coulomb of charge flows through a cross section of conductor per second.  

(ii) What are the following symbols mean in an electric circuit.

LA Q 1.jpg

Answer

  1. Rheostat 
  2. Closed plug key

(iii) Draw a closed circuit diagram consisting of 0.5 m long nichrome wire XY, an ammeter, a voltmeter, four cells of 1.5 V and a plug key.

Answer

Draw a closed circuit diagram -Teachoo.jpg

Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class

Ask a doubt
Maninder Singh's photo - Co-founder, Teachoo

Made by

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo