(a) Find the ratio of resistances of two copper rods X and Y of lengths 30 cm and 10 cm respectively and having radii 2 cm and 1 cm respectively. (b) A current of 500 mA flows in a series circuit containing an electric lamp and a conductor of 10Ω when connected to 6V battery. Find the resistance of the electric lamp.
(a) Find the ratio of resistances of two copper rods X and Y of lengths 30 cm and 10 cm respectively and having radii 2 cm and 1 cm respectively. (b) A current of 500 mA flows in a series circuit containing an electric lamp and a conductor of 10Ω when connected to 6V battery. Find the resistance of the electric lamp.
(a) The ratio of resistances of two copper rods X and Y of lengths 30 cm and 10 cm respectively and having radii 2 cm and 1 cm respectively is 36:1. (b) The resistance of the electric lamp is .
Hint
(a) The ratio of resistances of two copper rods X and Y of lengths 30 cm and 10 cm respectively and having radii 2 cm and 1 cm respectively is 36:1. (b) The resistance of the electric lamp is . The resistance of the electric lamp is .
Analysis & Explanation
(a) The ratio of resistances of two copper rods X and Y of lengths 30 cm and 10 cm respectively and having radii 2 cm and 1 cm respectively is 36:1. (b) The resistance of the electric lamp is . The resistance of the electric lamp is .
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2020?
This question carries 5 marks in the CBSE Class 10 Science 2020 examination.
Which chapter does this question come from in Science?
This question is from the chapter "Electricity" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Electricity" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2020 paper?
This is a Long Answer question from Section C in the CBSE Class 10 Science 2020 paper.