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 2020-2021

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

Class 10 Science Chapter 12 MCQ with Answers for 2020-21

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 2020-2021.

Q1

Unit of electric power may also be expressed as

[A]. Volt ampere
[B]. Kilowatt hour
[C]. Watt second
[D]. Joule second
Q2

In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be

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




Q3

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
Q4

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



Q5

What is the maximum resistance which can be made using five resistors each of 1/5 Ω?

[A]. 1/5 Ω
[B]. 10 Ω
[C]. 5 Ω
[D]. 1 Ω
Q6

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
Q7

An electric fuse works on the:

[A]. Chemical effect of current
[B]. Magnetic effect of current
[C]. Lighting effect of current
[D]. Heating effect of current
Q8

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.




Q9

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
Q10

The resistance of a wire of length 300 m and cross-section area 1.0 mm2 made of material of resistivity 1.0 × 10−7 Ωm is:

[A]. 2 Ω
[B]. 3 Ω
[C]. 20 Ω
[D]. 30 Ω
What is meant by an electric circuit?

A continuous and closed path of an electric current is called an electric circuit.

What is fuse wire and how does it work?

The fuse is placed in series with the device. It consists of a piece of wire made of a metal or an alloy of appropriate melting point, for example aluminium, copper, iron, lead etc. If a current larger than the specified value flows through the circuit, the temperature of the fuse wire increases. This melts the fuse wire and breaks the circuit.

What do you know about a resistor?

A conductor having some appreciable resistance is called a resistor.

What is variable resistance or rheostat?

A component used to regulate current without changing the voltage source is called variable resistance.



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