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Home › Grade7 › Grade 7 Olympiad › Science Olympiad-Grade-7 › Electricity › Electricity Worksheet-3

Electricity Worksheet-3

Electricity Worksheet-3

 

  1. A voltameter consists of a glass vessel containing:

(a) a cathode and electrolyte

(b) a cathode and anode

(c) an anode and electrolyte

(d) a cathode, an anode and electrolyte

 

  1. During electroplating the article to be electroplated is connected to the :

(a) cathode                                     (b) anode

(c) Anode or cathod                     (d) none of these

 

  1. Which device is not based on heating effects of electric current?

(a) Hot plate                                  (b) Toaster

(c) Transformer                            (d) Geyser

 

  1. The material used to make an element of electric heater is :

(a) brass                                         (b) nichrome

(c) steel                                           (d) magnesium

 

  1. The path along which an electric current flows is called :

(a) electric path                            (b) electric passage

(c) electric circuit                         (d) none of these

 

  1. An electric circuit which starts from one terminal of a cell and ends at the other terminal of the cell, without any break is called :

(a) open electric circuit

(b) closed electric circuit

(c) complete electric circuit

(d) both closed electric circuit and complete electric circuit

 

  1. The positive terminal of a simple le-clanche cell consists of :

(a) zinc                                            (b) carbon

(c) copper                                       (d) none of these

 

  1. The negative terminal of a simple le- clanche cell consists of :

(a) zinc                                            (b) aluminium

(c) iron                                            (d) copper

 

  1. The liquid used in the voltaic cell is :

(a) dilute sulphuric acid             (b) dilute nitric acid

(c) dilute sodium hydroxide      (d) none of these

 

  1. The emf of a simple voltaic cell is about :

(a) 0.5 V             (b) 0.75 V          (c) 1.0 V             (d) 1.25 V

 

Answer Key:

  1. (d)
  2. (a)
  3. (c)
  4. (b)
  5. (c)
  6. (d)
  7. (b)
  8. (a)
  9. (a)
  10. (c)