MCQ Questions for Class 7 Science Chapter 14 Electric Current and Its Effects

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 MCQs Questions with Answers

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

(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

(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

(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

(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

(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

(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

(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

(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

(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

(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

(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)

(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

(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

(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

(a) open circuit
Open circuit is broken at some point.

Question 16.
symbol represents:
(a) cell
(b) battery
(c) closed circuit
(d) open key

(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

(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

(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

(b) electric cell
Electrical cell represents symbol.

Question 20.
symbol represents:
(a) wire
(b) battery
(c) cell
(d) switch in ‘ON’ position

(d) switch in ‘ON’ position
symbol represents switch in ‘ON’ position.

Question 21.
symbol represents:
(a) wire
(b) cell
(c) bulb
(d) battery

(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

(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

(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

(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

(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

(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

(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

(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

(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
 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
 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
 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.

False

Question 2.
Longer line in the symbol for a cell represents its negative terminals.

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.

False

Question 4.
An electromagnet attracted a table of wood.

False

Question 5.
An electric bell has not an electromagnet.

False

Question 6.
When the electric current through the fuse exceeds a certain limit, the fuse wire melts and break.

True

Question 7.
Plastic is not a magnetic substances.

True

Question 8.
A key or an electric switch is a control consisting of an electrical device for changing the connections.

True

Question 9.
The amount of heat depends on its length, thickness, length in a wire.

True

Question 10.
Mans Christian was the first person to notice the deflection of compass needle.

True

Question 11.
The electrical circuit which is broken at some point is called short circuit.

False

Question 12.
Plastic is the best conductor of electricity.

False

Fill in the blanks:

Question 1.
The depostion of a layer of metal on some other metal is called ……………………..

electroplating

Question 2.
A combination of two or more cells is called ……………………..

battery

Question 3.
The …………………….. terminal of one cell is connected to the negative terminal of the next cell.

positive

Question 4.
Bulb …………………….. when the circuit is complte.

glows

Question 5.
…………………….. is a device used to prevent any change being caused to circuit and electric appliances.

Fuse

Question 6.
…………………….. is a coil of wire which gets heated up when electric current is passed through it.

Element

Question 7.
Electromagnet is a …………………….. magnetism.

temporary

Question 8.
The wastage of electricity by a bulb can be reduced by using …………………….. tube lights.