3. Write True or False.
(a) Electric current can only flow in a closed circuit.
(b) A bulb with a broken filament will glow when it gets heated.
(c) Electric current flows from the negative to positive terminal in a cell.
(d) Insulators serve as a safety device in electric equipment.
(e) A battery consisting of three cells has six terminals.
(f) The human body is a good conductor of electricity.
(g) Rubber is an example of an insulator.
(h) The base of an electric cell is the negative terminal.
(i) The filament of an electric bulb is connected to one terminal only.
(1) Rubber strings can be used instead of metal wires while making
an electric circuit.
(k) A switch is made of an insulator.
Answers
Answer:
true
false
false
true
true(may be)
true
true
Don't know
false
false
true
Write True or False.
(a) Electric current can only flow in a closed circuit.
(b) A bulb with a broken filament will glow when it gets heated.
(c) Electric current flows from the negative to positive terminal in a cell.
(d) Insulators serve as a safety device in electric equipment.
(e) A battery consisting of three cells has six terminals.
(f) The human body is a good conductor of electricity.
(g) Rubber is an example of an insulator.
(h) The base of an electric cell is the negative terminal.
(i) The filament of an electric bulb is connected to one terminal only.
(1) Rubber strings can be used instead of metal wires while making
an electric circuit.
(k) A switch is made of an insulator.
Explanation:
True or False.
(a) Electric current can only flow in a closed circuit.
True , because if all the connections are proper than only current can flow .
(b) A bulb with a broken filament will glow when it gets heated.
False , it will not glow because connections are broken ,
(c) Electric current flows from the negative to positive terminal in a cell.
False , Electric current flows from the positive to negative terminal in a cell
(d) Insulators serve as a safety device in electric equipment.
True , because they cant conduct electricity so, prevent us from shock.
(e) A battery consisting of three cells has six terminals.
False , it has 2 cells , one positive and one negative
(f) The human body is a good conductor of electricity.
True , because in body various ions move that can conduct current .
(g) Rubber is an example of an insulator.
True , it does not allow current to pass
(h) The base of an electric cell is the negative terminal.
True , it can be
(i) The filament of an electric bulb is connected to one terminal only.
False , it is connected to both terminals of cell.
(1) Rubber strings can be used instead of metal wires while making
an electric circuit.
False , rubber strings are insulator .
(k) A switch is made of an insulator.
False , it is made up of conductive material .