Class 7 Electric Current And Its Effects CBSE Questions & Answers

Class 7 · Electric Current And Its Effects

This is Science Class 7 Electric Current and its Effects CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Battery is the combination of
  • A
    Two or more cells in series combination
    Correct
  • B
    Only two cells in parallel combination
  • C
    Only two cells in parallel combination
  • D
    Two or more cells in parallel combination
2
In bulbs electricity is converted into
  • A
    Sound energy
  • B
    Light energy
    Correct
  • C
    Mechanical energy
  • D
    Heat energy
3
Electric fuse works on the principle of _____________ effect of current.
  • A
    Magnetic
  • B
    Chemical
  • C
    Electromagnetic
  • D
    Heating
    Correct
4
In bulbs electricity is converted into
  • A
    Sound energy
  • B
    Mechanical energy
  • C
    Light energy
    Correct
  • D
    Heat energy
5
A conductor having very low resistance is called
  • A
    Good conductor
    Correct
  • B
    Insulator
  • C
    Super conductor
  • D
    Resistor
6
In an electric circuit, current flows from
  • A
    Positive to negative terminal
    Correct
  • B
    Positive to neutral terminal
  • C
    Negative to neutral terminal
  • D
    Negative to positive terminal
7
Superconductor are those conductor that
  • A
    Considerable resistance
  • B
    Very high resistance
  • C
    Have no resistance
  • D
    have almost negligible resistance
    Correct
8
In electric circuit, components are represented by using
  • A
    Symbol of components
    Correct
  • B
    Rough sketch of components
  • C
    Colour of components
  • D
    Actual drawing of components
9
In the symbol of electric cell longer line represent
  • A
    Positive terminal
    Correct
  • B
    Negative terminal
  • C
    Neutral terminal
  • D
    Earthing terminal
10
Electricity will not flow through circuit if
  • A
    There is a key in the circuit
  • B
    Circuit is incomplete
  • C
    Connector is covered with plastic
  • D
    Circuit is complete
    Correct
11
The wire used to connect the various components of electric circuit is represented by
  • A
    Curve
  • B
    Circle
  • C
    Rectangle
  • D
    Line
    Correct
12
In a battery, cells are connected
  • A
    Any terminal can be connected
  • B
    Negative to negative terminal
  • C
    Positive to positive terminal
  • D
    Positive to negative terminal
    Correct
13
In an electric circuit bulb glows only when switch is in
  • A
    Open position
  • B
    Any position
  • C
    Closed position
    Correct
  • D
    Either open or closed position
14
When a bulb get fused, its
  • A
    Connector is broken
  • B
    Filament is broken
    Correct
  • C
    Filament holder is broken
  • D
    Glass case is broken
15
In an electric circuit, key or switch can be placed
  • A
    Between bulb and battery
  • B
    Between battery and ammeter
  • C
    Between bulb and ammeter
  • D
    Any where in the circuit
    Correct