Current Electricity Chapter Board Questions Class10 ICSE
Here we provide Class 10 Maths important notes,board questions and predicted questions with Answers for chapter Current Electricity .These important notes,board questions and predicted questions are based on ICSE board curriculum and correspond to the most recent Class 10 Maths syllabus. By practising these Class 10 materials, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 10 Board examinations.
2020
Q1
Define a kilowatt hour. How is it related to joule?
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Q2
Calculate the total resistance across AB
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Q3
(i) What are superconductors?
(ii) Calculate the current drawn by an appliance rated 110 W, 220 V when connected across 220 V supply.
(iii) Name a substance whose resistance decreases with the increase in temperature.
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(ii) Calculate the current drawn by an appliance rated 110 W, 220 V when connected across 220 V supply.
(iii) Name a substance whose resistance decreases with the increase in temperature.
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Q4
The diagram above shows three resistors connected across a cell Of e.m.f. 1.8 V and internal resistance r. Calculate:
(i) Current through 3 Ω resistor.
(ii) The internal resistance r.
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The diagram above shows three resistors connected across a cell Of e.m.f. 1.8 V and internal resistance r. Calculate:
(i) Current through 3 Ω resistor.
(ii) The internal resistance r.
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2019
Q1
How does an increase in the temperature affect the specific resistance of a:
(i) Metal and
(ii) Semiconductor?
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(i) Metal and
(ii) Semiconductor?
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Q2
Calculate the effective resistance across AB:-
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Q3
The diagram above shows a circuit with the key k open. Calculate:
(i) the resistance of the circuit when the key k is open.
(ii) the current drawn from the cell when the key k is open.
(iii) the resistance of the circuit when the key k is closed.
(iv) the current drawn from the cell when the key k is closed.
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The diagram above shows a circuit with the key k open. Calculate:
(i) the resistance of the circuit when the key k is open.
(ii) the current drawn from the cell when the key k is open.
(iii) the resistance of the circuit when the key k is closed.
(iv) the current drawn from the cell when the key k is closed.
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2018
Q1
You have three resistors of values 2Ω, 3Ω and 5Ω. How will you join them so
that the total resistance is more than 7Ω?
(i) Draw a diagram for the arrangement
(ii) Calculate the equivalent resistance.
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(i) Draw a diagram for the arrangement
(ii) Calculate the equivalent resistance.
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Q2
Find the equivalent resistance between A and B.
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Q3
A fuse is rated 8A.Can it be used with an electrical appliance rated 5 K W,
200 V? Give a reason.
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Q4
An electric iron is rated 22OV,2kW
(i) If the iron is used for 2h daily find the cost of running it for one week if it costs 4.25 per kWh
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(i) If the iron is used for 2h daily find the cost of running it for one week if it costs 4.25 per kWh
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2017
Q1
An electric bulb of resistance 500Ω, draws a current of 0.4A. Calculate the
power ofthe bulb and the potential difference at its end.
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Q2
(i) What are free electrons ?
(ii) do they not leave the metal surface on their own?
(iii) How can they be made to leave the metal surface? (State any two ways)
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(ii) do they not leave the metal surface on their own?
(iii) How can they be made to leave the metal surface? (State any two ways)
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2016
Q1
A music system draws a current of 400 mA when connected to a 12 V battery.
(i) What is the resistance of the music system?
(ii) The music system is left playing for several hours and finally the battery voltage drops and the music system stops playing when the current drops to 320 mA. At what battery voltage does the music system stop playing?
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(i) What is the resistance of the music system?
(ii) The music system is left playing for several hours and finally the battery voltage drops and the music system stops playing when the current drops to 320 mA. At what battery voltage does the music system stop playing?
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Q2
Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5A current in 5
minutes.
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