Class 7 Science Chapter 14 MCQs Questions With Answers NCERT
Students are advised to practice the NCERT MCQ Questions for Class 7 Science Chapter 14 Electric Current and Its Effects with Answers Pdf free download is available here. MCQ Questions for Class 7 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Electric Current and Its Effects Class 7 MCQs Questions with Answers and assess their preparation level.
Electric Current and Its Effects Class 7 MCQ
Solving the Electric Current and Its Effects Multiple Choice Questions of Class 7 Science Chapter 14 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Electric Current and Its Effects Class 7 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 14 Science Class 7 and cross-check your answers during preparation.
Question 1.
Bulbs, wires, cells and switches are known as the of a circuit.
(a) element
(b) switch
(c) filament
(d) none of these
Answer
(a) element
Wires, cells, switches, bulbs are element of a circuit.
Question 2.
An element measure the flowing an electric current is:
(a) voltmeter
(b) filament
(c) circuit
(d) ammeter
Answer
(d) ammeter
An ammeter measure the flowing electric current.
Question 3.
An element measure the potential difference between two points in an electric circuit is:
(a) voltmeter
(b) filament
(c) circuit
(d) ammeter
Answer
(a) voltmeter
Voltmeter measure the difference of two points.
Question 4.
Electric current has energy called:
(a) voltmeter
(b) filament
(c) electrical energy
(d) none of these
Answer
(c) electrical energy
Electric current has electric energy.
Question 5.
The magnetic material around the coil is wound is called:
(a) magnetic substance
(b) core
(c) soft iron
(d) none
Answer
(b) core
The magnetic material around the coil is wound is core.
Question 6.
Very strong electromagnets are used for lifting:
(a) fans
(b) washing machines
(c) heavy iron pieces
(d) none of these
Answer
(c) heavy iron pieces
Very strong electromagnet is used for lifting iron pieces.
Question 7.
A safety device that cuts off the current in a circuit if a sudden heavy current starts flowing in it is:
(a) fuse
(b) ammeter
(c) solenoid
(d) none of these
Answer
(a) fuse
Fuse is a safety device that cuts off the current.
Question 8.
A cylindrical coil of current carrying wire is:
(a) voltmeter
(b) ammeter
(c) fuse
(d) solenoid
Answer
(d) solenoid
A solenoid is a cylindrical coil of wire.
Question 9.
A coil of insulated currrent- carrying wire wound around a piece of a magnetic substance is:
(a) voltmeter
(b) magnetic coil
(c) electromagnet
(d) none of these
Answer
(c) electromagnet
An electromagnet is a coil of insulated wire.
Question 10.
Which of these is not circuit element ?
(a) potential difference
(b) voltmeter
(c) resistor
(d) battery
Answer
(c) resistor
Resistor is not a circuit element.
Question 11.
Which of these appliances does not use on electro magnet?
(a) washing
(b) refrigerator
(c) room heater
(d) electric bell
Answer
(c) room heater
Room heater does not use an electro magnet.
Question 12.
The fuse wire:
(a) never breaks
(b) breaks on shorting of wire
(c) breaks on flowing of excessive current
(d) both (b) and (c)
Answer
(d) both (b) and (c)
Always fuse breaks on shorting of wire and flowing exessive current.
Question 13.
Which of the following liquid is bad conductor of electricity:
(a) salted water
(b) orange juice
(c) lemon juice
(d) none of these
Answer
(d) none of these
None of these Liquid is bad conductor of electricity.
A circuit diagram represent on electrical circuit.
Question 14.
Which of the following substance is conductor of electricity:
(a) rubber
(b) paper
(c) nails
(d) plastic
Answer
(c) nails
Nails is conductor of electricity.
Question 15.
The electric current which is broken at some point is called:
(a) open circuit
(b) closed circuit
(c) short circuit
(d) long circuit
Answer
(a) open circuit
Open circuit is broken at some point.
Question 16.
symbol represents:
(a) cell
(b) battery
(c) closed circuit
(d) open key
Answer
(c) closed circuit
This symbol represents closed key.
Question 17.
A circuit diagram represent on:
(a) switch
(b) electrical circuit
(c) cells
(d) none of these
Answer
(a) switch
A circuit diagram represent on electrical circuit.
Question 18.
A control consisting of a electrical device for making or breaking or changing the connections in a circuit is:
(a) a switch
(b) a key
(c) both (a) and (b)
(d) none of these
Answer
(c) both (a) and (b)
Both (a) and (b) are control consisting device of electricsl.
Question 19.
symbol represents:
(a) electric bulb
(b) electric cell
(c) battery
(d) wire
Answer
(b) electric cell
Electrical cell represents symbol.
Question 20.
symbol represents:
(a) wire
(b) battery
(c) cell
(d) switch in ‘ON’ position
Answer
(d) switch in ‘ON’ position
symbol represents switch in ‘ON’ position.
Question 21.
symbol represents:
(a) wire
(b) cell
(c) bulb
(d) battery
Answer
(a) wire
symbol represents wire.
Question 22.
Such a combination of two or more cells is called :
(a) wire
(b) cell
(c) bulb
(d) battery
Answer
(d) battery
Combination of two or more cells is called battery.
Question 23.
The batteries used in tractors, trucks and inverter are also made from:
(a) cells
(b) wire
(c) battery
(d) none of these
Answer
(a) cells
The batteries used in tractors, trucks are also made from cells.
Question 24.
The positive terminal of one cell is connected to the:
(a) positive terminal
(b) negative terminal
(c) wire
(d) bulb
Answer
(b) negative terminal
The positive terminal of one cell is connected to the negative terminal.
Question 25.
The bulb glows as soon as the switch is moved to the:
(a) ‘ON’ position
(b) ‘OFF’ position
(c) both (a) and (b)
(d) none of these
Answer
(a) ‘ON’ position
The bulb glows as soon as the switch is ‘ON’ position.
Question 26.
The electric current flows from the end of cell marked ‘+’ called the:
(a) negative terminal
(b) positive terminal
(c) electric current
(d) none of these
Answer
(d) none of these
The cell marked ‘+’ is called positive terminal.
Question 27.
Through the metal wires to the end marked ‘ — ’ called the:
(a) bulb
(b) positive terminal
(c) battery
(d) negative terminal
Answer
(d) negative terminal
The marked ‘ is called the negative terminal.
Question 28.
The bulb has a thin wire called:
(a) battery
(b) cell
(c) filament
(d) none of these
Answer
(b) cell
The bulb has thin wire called filament.
Question 29.
A fan used electric current to rotate to blow:
(a) air
(b) current
(c) wire
(d) none of these
Answer
(a) air
A fan uses electric current to rotate to blow air.
Match the column A with column B:
Question 1.
| Column-A | Column-B |
| (a) Ordinary magnet | (i) U-shaped iron rod |
| (b) Hammer | (ii) Soft iron rod |
| (c) Electriomagnet | (iii) Steel and armature |
| (d) Armature | (iv) Permanent magnetism |
Answer
| Column-A | Column-B |
| (a) Ordinary magnet | (iv) Permanent magnetism |
| (b) Hammer | (iii) Steel and armature |
| (c) Electromagnet | (i) U-shaped iron rod |
| (d) Armature | (ii) Soft iron rod |
Question 2.
| Column-A | Column-B |
| (a) MCB | (i) Battery |
| (b) Battery | (ii) The bulb will not glow |
| (c) Two or more cells | (iii) Tractors, trucks |
| (d) ‘OFF’ position | (iv) Miniature Circuit Breaker |
Answer
| Column-A | Column-B |
| (a) MCB | (iv) Miniature Circuit Breaker |
| (b) Battery | (iii) Tractors, trucks |
| (c) Two or more cells | (i) Battery |
| (d) ‘OFF’ position | (ii) The bulb will not glow |
Question 3.
| Column-A | Column-B |
| (a) Electromagnet | (i) Battery |
| (b) Electric bell | (ii) Attracted piece of iron |
| (c) Longer Line | (iii) Electromagnet |
(d)  |
(iv) Positive terminal |
Answer
| Column-A | Column-B |
| (a) Electromagnet | (ii) Attracted piece of iron |
| (b) Electric bell | (iii) Electromagnet |
| (c) Longer Line | (iv) Positive terminal |
| (d) |
(i) Battery |
State the following statements are True or False:
Question 1.
The fuse wire never breaks.
Answer
False
Question 2.
Longer line in the symbol for a cell represents its negative terminals.
Answer
False
Question 3.
To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of other cell.
Answer
False
Question 4.
An electromagnet attracted a table of wood.
Answer
False
Question 5.
An electric bell has not an electromagnet.
Answer
False
Question 6.
When the electric current through the fuse exceeds a certain limit, the fuse wire melts and break.
Answer
True
Question 7.
Plastic is not a magnetic substances.
Answer
True
Question 8.
A key or an electric switch is a control consisting of an electrical device for changing the connections.
Answer
True
Question 9.
The amount of heat depends on its length, thickness, length in a wire.
Answer
True
Question 10.
Mans Christian was the first person to notice the deflection of compass needle.
Answer
True
Question 11.
The electrical circuit which is broken at some point is called short circuit.
Answer
False
Question 12.
Plastic is the best conductor of electricity.
Answer
False
Fill in the blanks:
Question 1.
The depostion of a layer of metal on some other metal is called ……………………..
Answer
electroplating
Question 2.
A combination of two or more cells is called ……………………..
Answer
battery
Question 3.
The …………………….. terminal of one cell is connected to the negative terminal of the next cell.
Answer
positive
Question 4.
Bulb …………………….. when the circuit is complte.
Answer
glows
Question 5.
…………………….. is a device used to prevent any change being caused to circuit and electric appliances.
Answer
Fuse
Question 6.
…………………….. is a coil of wire which gets heated up when electric current is passed through it.
Answer
Element
Question 7.
Electromagnet is a …………………….. magnetism.
Answer
temporary
Question 8.
The wastage of electricity by a bulb can be reduced by using …………………….. tube lights.
Answer
fluorescent
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