STD-VI, Electric Current and Circuits, Objective Question-Answers

 

1.  This is used for grinding of wheat-

(a) electric alarm clock

(b) electric flour mill

(c) electric fan

(d) electric oven

 

ANS: electric flour mill

 

2.  Electricity can be generated from _____ sources.

(a) renewable

(b) non-renewable

(c) both renewable and non-renewable

(d) None of these

 

ANS: both renewable and non-renewable

 

3.  Combination of cells form a-

 

ANS: Battery

 

4.  The electric bulb in a torch is kept at the focus of a ______ mirror.

 

ANS: Concave

 

5.  Electric cells produce electricity from ______ stored, and arranged inside them.

 

ANS: Metals and chemicals

 

6.  The thin metal wire is called the _____ of the bulb.

(a) filament

(b) metal strip

(c) terminal

(d)  ring

 

ANS: Filament

 

7.  Accumulators are ______.

(a) chargeable

(b) not chargeable

(c) replaced by primary cells

(d) used in wrist watches

ANS: chargeable

 

8.  We need a minimum of ____ elements in the simplest of electric circuits.

(a) 2

(b) 3

(c) 4

(d) 5

 

ANS: 3

 

9.  _____ is a conductor of electricity.

(a) graphite

(b) plastic

(c) wood

(d) bakelite

 

ANS: Graphite

 

10.  An element used to complete or break the circuit is the-

(a) bulb

(b) wire

(c) switch

(d) cell

ANS: Switch