Class 8 Chemical Effects Of Electric Current CBSE Questions & Answers

Class 8 · Chemical Effects Of Electric Current

This is Science Class 8 Chemical Effects of Electric Current CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
When the liquid between two ends of allow electric current than
  • A
    Colour of tester bulb changes
  • B
    All of the above
  • C
    Bulb of tester glows
    Correct
  • D
    Bulb of tester heat up only
2
Which metal is electroplated on iron for making “cans” for storing food and drinks?
  • A
    Silver metal
  • B
    Tin metal
    Correct
  • C
    Copper metal
  • D
    Chromium metal
3
When two or more cells are joined together it forms a
  • A
    Radio
  • B
    Transistor
  • C
    Battery
    Correct
  • D
    Dynamo
4
In which type of cell zinc and copper plates are dipped in separate solution?
  • A
    Dry cell
  • B
    Lachlan he cell
  • C
    Plant cell
  • D
    Voltaic cell
    Correct
5
Electric current is said to be pass through a wire when
  • A
    No particle pass through it
  • B
    Only proton pass through it
  • C
    Both electron and neutron pass through it
  • D
    Only electron pass through it
    Correct
6
What is the common name for manganese-dioxide-alkaline-zinc cell?
  • A
    Moz cell
  • B
    Alkaline cell
    Correct
  • C
    Long life cell
  • D
    Manganese-dioxide
7
Electric current is measured by a device
  • A
    Voltmeter
  • B
    Ammeter
    Correct
  • C
    Galvanometer
  • D
    Odometer
8
Heating effect of electric current is used in
  • A
    Electric motor
  • B
    Solar cell
  • C
    Electric bulb
    Correct
  • D
    Electric generator
9
Conductor having very high resistance is
  • A
    Insulator
    Correct
  • B
    Good conductor
  • C
    Resistor
  • D
    Semi conductor
10
Potential difference is created in a electric circuit due to
  • A
    Switch
  • B
    Conductor
  • C
    Cell or battery
    Correct
  • D
    Voltmeter
11
In electric circuit, current flows due to
  • A
    Difference in temperature
  • B
    Difference in potential difference
    Correct
  • C
    Same potential difference
  • D
    Difference in current
12
Heating effect of electric current is used in
  • A
    Earth wire
  • B
    Bread toaster
    Correct
  • C
    Switch
  • D
    Electric watch
13
Electric circuit provides a complete path for
  • A
    Current to flow
    Correct
  • B
    Neutron to flow
  • C
    Proton to flow
  • D
    Heat to flow
14
Fuse wire is used in electric circuit to prevent
  • A
    Prevent the ammeter
  • B
    Electrical appliances and circuit
    Correct
  • C
    Us from electric shock
  • D
    Prevent the insulator
15
Which of the following is a poor conductor of electricity?
  • A
    Steel spoon
  • B
    Tap water
  • C
    Air
    Correct
  • D
    Iron nail