| CBSE Class 10 Science | Chapter12 | Electricity | By Shruti Academy In this video, I have explained about the resistance in the electric circuits in depth from chapter-12 class 10 CBSE NCERT. The two 10 resistors are connected in series and they are parallel to the 5 resistor.The equivalent resistance, Subject. The unit of electrical resistance is ohm which is defined as volt per ampere. ... Resistance, \(\mathrm{R} \alpha \frac{1}{\mathrm{A}}\). 2. [CBSE 2010] Ans. The electrical resistance of a conductor is dependent on the following factors: Electrical resistance is directly proportional to length (L) of the conductor and inversely proportional to the cross-sectional area (A). Q. A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc. What happens to the resistance of insulators with an increase in temperature? The time will be 1/10 hr. 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(ii) Now, a resistance of 10 Ω is connected in parallel with the series combination. Resistance is a property of conductor due to which it resists the flow of electric current through it. The other … Equivalent resistance of the circuit is the sum of individual resistances. The higher the temperature the higher is the resistance. Equivalent series resistance between A and B, R, = 2+2 = 4 Ω A conductor has large number of free electrons.When a potential difference is maintained across the ends of conductor,the free electrons move from one end to other end.During their movement,they collide with each other and with atoms of conductor.These collision opposes the movement of electrons from one end to other end.This opposition to the flow of electrons … Resistance and Resistivity. 6 min. The reason behind this is the increase in the number of electrons in the conduction band which reduces the mobility thereby increasing the resistance. What is Resistance? Q2.What happens to the resistivity if resistance and length are constant and the cross-sectional area is doubled? 1) Connecting wires in electric circuit are made up of Cu and Al. Question 1. Answer: Given: p = 1.60 × 10-6 Ω m, l = 10 m and A = 2 x 10-3 m 2 Resistance, Question 22. When connected in series, the value becomes 9 Ω. Q5. therefore by solving for resistivity we get. Filed Under: Class 10, Electricity Tagged With: resistance, resistors are connected in series, series arrangement of resistors About Mrs Shilpi Nagpal Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. unit of resistance is ohm. The electrical resistance of a circuit is the ratio between the voltage applied to the current flowing through it. 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