Class 10 Science
Electricity
Question 1:
Electric current is measured using __________.
(a) Galvanometer
(b) Ammeter
(c) Voltmeter
(d) Potentiometer
Question 2:
Why tungsten is used in filament of electric bulb?
(a) High Melting point
(b) High Boiling point
(c) Both
(d) none
Question 3:
Electric potential is __________.
(a) vector quantity
(b) dimensionless quantity
(c) scalar quantity
(d) none of the option
Question 4:
The variable resistance is known as __________.
(a) open switch
(b) resistance
(c) rheostat
(d) none of these
Question 5:
When the diameter of the wire is doubled. What is the effect on the resistance?
(a) Doubled
(b) Halved
(c) Four times
(d) One-fourth
Question 6:
Three resistances 2 ohm, 4 ohm, 6 ohm are connected in series. What is the equivalent resistance?
(a) 6 ohm
(b) 4 ohm
(c) 12 ohm
(d) 10 ohm
Question 7:
The commercial unit of energy__________.
(a) Joule
(b) kWh
(c) kW
(d) kJ
Question 8:
Electrical resistivity of a given wire mainly depends upon
(a) its length
(b) its thickness
(c) its shape
(d) nature of material
Question 9:
A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of
(a) more length
(b) less radius
(c) less length
(d) more radius
Question 10:
How much work is done in moving a charge of 2 C across two points having a potential difference 12 V?
(a) 24 J
(b) 12 J
(c) 20J
(d) 22J
Question 11:
The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V?
Question 12:
A wire of given material having length l and area of cross-section A has a resistance of 8 Ω. What would be the resistance of another wire of the same material having length l/2 and area of cross-section 4A?
Question 13:
An electric lamp of 100 Ω, a toaster of resistance 50 Ω, and a water filter of resistance 500 Ω are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances, and what is the current through it?
Question 14:
Give two reasons why different electrical appliances in a domestic circuit are connected in parallel.
Question 15:
Why does the cord of an electric heater not glow while the heating element does?
Question 16:
An electric refrigerator rated 400 W operates 8 hour/day. What is the cost of the energy to operate it for 30 days at Rs 3.00 per kW h?
Question 17:
Give reason for the following:
(i) Electric bulbs are usually filled with chemically inactive gases like nitrogen and argon.
(ii) Copper and aluminium wires are usually employed for electricity transmission.
(iii) Fuse wire is placed in series with the device.
Question 18:
Why elements of electrical heating devices are made up of nichrome alloy?
Question 19:
100 J of heat is produced each second in a 4 Ω resistance. Find the potential difference across the resistor.
Question 20:
An electric iron consumes energy at a rate of 480 W when heating is at the maximum rate and 360 W when the heating is at the minimum. The voltage is 220 V. What are the current and the resistance in each case?
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In summary, problem-solving after learning a theoretical concept on CBSE Electricity Class 10 Science is an essential part of the learning process. It enhances your understanding, critical thinking abilities, and retention of knowledge. Moreover, it equips you with valuable skills that are applicable in academic, personal, and professional contexts.
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Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.
All About Daily Practice Problems on Class 10 Science Electricity NCERT Chapter 11
Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on Class 10 Science Electricity NCERT Chapter 11 useful.
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