# Class 10 Science Chapter 12 MCQ

Class 10 Science Chapter 12 MCQ (Multiple Choice Questions) of Electricity. These questions are not only helpful in revision of chapter but in understanding the concepts also. MCQ includes questions based on intext book questions and exercises main points questions.

Practice with these questions to score better in school tests and in MCQ based competition also. These MCQs ensure scoring good marks in all the exams.

## Class 10 Science Chapter 12 MCQ Online Test for 2021-2022

 Class: 10 Science Chapter: 12 Electricity Contents: MCQ Online Tests with Answers and Explanation

### Class 10 Science Chapter 12 MCQ with Answers for 2021-22

Class 10 Science Chapter 12 MCQ Online Test with solutions and answers. There are more than 70 questions in the form of MCQs covering the entire chapter 12 of Class 10 Science. Most of the questions are confined to Latest NCERT Books for class 10 Science issued for session 2021-2022.

Q1

#### Consider the following statements and choose the correct one:

[A]. Opposite charges attract each other.
[B]. Similar charges repel each other.
[C]. The SI unit of electric charge is coulomb.
[D]. All the above
Q2

#### Unit of electric power may also be expressed as

[A]. Volt ampere
[B]. Kilowatt hour
[C]. Watt second
[D]. Joule second
Q3

[A]. 1 A
[B]. 2 A
[C]. 4 A
[D]. 5 A
Q4

#### Read the following sentences carefully, and choose the correct one:

[A]. The electric potential at a point in an electric field is defined as the work done in moving a unit positive charge from infinity to that point.
[B]. A potential of 1 volt at a point means that 1 joule of work is done in moving 1 unit positive charge from infinity to that point.
[C]. The difference in electric potential between two points is known as potential difference.
[D]. All the above.
Q5

[A]. 5 J
[B]. 10 J
[C]. 20 J
[D]. 30 J

Q6

#### The resistivity does not change if

[A]. The material is changed
[B]. The temperature is changed
[C]. The shape of the resistor is changed
[D]. Both material and temperature are changed
Q7

#### Ankush appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

[A]. A single dry cell has a potential difference of 1.5 volts between its two terminals.
[B]. The actual flow of electrons which constitutes the current from negative terminal to positive terminal of a cell.
[C]. The conventional direction of electric current is from positive terminal of a cell or a battery to the negative terminal, through the outer circuit.
[D]. None of the above.
Q8

#### Which of the following statement is or are correct?

[A]. Circuit is a continuous conducting path consisting of wires and switch between two terminals of a cell along which an electric current flow.
[B]. The electric current is a flow of electrons in a metal wire or conductor when a battery is applied across its ends.
[C]. The simplest way to maintain a potential difference between the two ends of a conductor is to connect the conductor between the terminals of a cell or battery.
[D]. All the above
Q9

#### In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?

[A]. If the potential difference across the ends of a conductor is doubled, the current flowing through it also gets halved.
[B]. A resistance is the ratio of potential difference applied between the ends of a conductor and the current flowing through it is constant quantity.
[C]. At constant temperature, the current flowing through a conductor is directly proportional to the potential difference across its ends.
[D]. If the resistance is doubled, the current gets halved.
Q10

#### Which of the following represents voltage?

[A]. Work done/ Current x Time
[B]. Work done x Charge
[C]. Work done x Time/Current
[D]. Work done x Charge x Time

Q11

#### Priya is writing some statements, choose the incorrect statement and help him:

[A]. Those substance which have very low electrical resistance are called good conductors.
[B]. Those substances which have comparatively high electrical resistance, are called resistors.
[C]. Those substances which have infinitely high electrical resistance are called insulators.
[D]. The heating element of electric iron is made of nichrome wire which is an insulator.
Q12

#### Pooja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. When the area of cross section of a wire is doubled its resistance gets halved.
[B]. A long wire or long conductor has more resistance.
[C]. When the length of a wire is halved, then its resistance also gets halved.
[D]. When the potential difference is halved the current gets doubled.
Q13

#### A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly

[A]. 10 to the power 20
[B]. 10 to the power16
[C]. 10 to the power18
[D]. 10 to the power23
Q14

#### Electrical resistivity of a given metallic wire depends upon

[A]. Its length
[B]. Its thickness
[C]. Its shape
[D]. Nature of the material
Q15

#### Keshav appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

[A]. the resistivity of a substance does not depend on its length or thickness, it depends on the nature of the substance and temperature.
[B]. We use copper and Aluminium wires for the transmission of electricity because copper and Aluminium have low resistivity.
[C]. The resistivity of alloys is much higher than those of the pure metals.
[D]. If we take a lot of copper metal one metre long and one square metre in area of cross section then its resistance will be 1.59 x 10 to the power -8.

Q16

#### Read the following sentences carefully, and choose the incorrect one:

[A]. Alloy of nickel, chromium, manganese and iron having a resistivity of about 60 times more than that of copper.
[B]. The heating elements of electrical heating appliances such as electric iron and toaster are made of an alloy rather than a pure metal.
[C]. Nichrome undergoes oxidation very easily at a high temperature.
[D]. Nichrome alloy is used for making the heating elements of electrical appliances.
Q17

#### Consider the following statements and choose the correct one:

[A]. The combined resistance of any number of resistance connected in series is equal to the sum of the individual resistances.
[B]. When two or more resistances are connected between the same two points, they are said to be connected in parallel.
[C]. When two or more resistances are connected end to end consecutively, they are said to be connected in series.
[D]. All the above.
Q18

#### In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. In series circuit, the appliances get the same voltage as that of the power supply line.
[B]. In series circuit, all the electrical appliances have only one switch due to which they cannot be turned on or off separately.
[C]. In series circuit, if one electrical appliance stops working due to some defect, then all other appliances also stop working.
[D]. In the series connection of electrical appliances, the overall resistance of the circuit increases too much due to which the current from the power supply is low.
Q19

[A]. 500°C
[B]. 1500°C
[C]. 2500°C
[D]. 4500°C
Q20

#### Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. Electric power is the electrical energy consumed per second.
[B]. When an electrical appliance consumes electrical energy at the rate of 1 joule per seconds, its power is said to be 1 watt.
[C]. The rate at which electrical work is done or the rate at which electrical energy is consumed, is called electric power.
[D]. Electric power = Potential difference / Current

Q21

[A]. 100 J
[B]. 600 J
[C]. 3600 J
[D]. 6000 J
Q22

[A]. 2 A
[B]. 5 A
[C]. 10 A
[D]. 15 A
Q23

[A]. 30 J/s
[B]. 12 J/s
[C]. 0.83 J/s
[D]. 3 J/s
Q24

#### The lamps in a house hold circuit are connected in parallel because:

[A]. This way they required less current
[B]. If one lamp fails the others remain lit
[C]. This way they require less power
[D]. If one lamp fails the other also fail
Q25

#### A wire of resistance R1 is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be R2, then the ratio R1/R2 is:

[A]. 1/25
[B]. 1/5
[C]. 5
[D]. 25

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