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Electricity Class 1 0 Important
Questions with Answers Science
Chapter 1 2
July 20, 2022 by Bhagya
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We have given these Important Questions for Class 10 Science Chapter 12 Electricity to
solve different types of questions in the exam. Previous Year Questions & Important
Questions of Electricity Class 10 Science Chapter 12 will help the students to score
good marks in the board examination.
Important Questions of Electricity Class 1 0
Science Chapter 1 2
Question 1.
A current of 10 A flows through a conductor for two minutes.
(i) Calculate the amount of charge passed through any area of cross section of the
conductor.
(ii) If the charge of an electron is 1.6 × 10-19 C, then calculate the total number of
electrons flowing. (Board Term I, 2013)
Answer:
Given that: I = 10 A, t = 2 min = 2 × 60 s = 120 s
(i) Amount of charge Q passed through any area of cross-section is given by I = Qt
or Q = I × t ∴ Q = (10 × 120) A s = 1200 C
, (ii) Since, Q = ne
where n is the total number of electrons flowing and e is the charge on one electron
∴ 1200 = n × 1.6 × 10-19
or n = 12001.6×10−19 = 7.5 × 1021
Question 2.
Define electric current. (1/5, Board Term 1,2017)
Answer:
Electric current is the amount of charge flowing through a particular area in unit time.
Question 3.
Define one ampere. (1/5, Board Term 1,2015)
Answer:
One ampere is constituted by the flow of one coulomb of charge per second.
1 A = 1 C s-1
Question 4.
Name a device that you can use to maintain a potential difference between the ends of
a conductor. Explain the process by which this device does so. (Board Term I, 2013)
Answer:
A cell or a battery can be used to maintain a potential difference between the ends of a
conductor. The chemical reaction within a cell generates the potential difference across
the terminals of the cell, even when no current is drawn from it. When it is connected to
a conductor, it produces electric current and, maintain the potential difference across
the ends of the conductor.
Question 5.
Draw the symbols of commonly used components in electric circuit diagrams for
(i) An electric cell
(ii) Open plug key
(iii) Wires crossing without connection
(iv) Variable resistor
(v) Battery
(vi) Electric bulb
(vii) Resistance (4/5, Board Term 1,2017)
Electricity Class 1 0 Important
Questions with Answers Science
Chapter 1 2
July 20, 2022 by Bhagya
Powered by
Topper7777
We have given these Important Questions for Class 10 Science Chapter 12 Electricity to
solve different types of questions in the exam. Previous Year Questions & Important
Questions of Electricity Class 10 Science Chapter 12 will help the students to score
good marks in the board examination.
Important Questions of Electricity Class 1 0
Science Chapter 1 2
Question 1.
A current of 10 A flows through a conductor for two minutes.
(i) Calculate the amount of charge passed through any area of cross section of the
conductor.
(ii) If the charge of an electron is 1.6 × 10-19 C, then calculate the total number of
electrons flowing. (Board Term I, 2013)
Answer:
Given that: I = 10 A, t = 2 min = 2 × 60 s = 120 s
(i) Amount of charge Q passed through any area of cross-section is given by I = Qt
or Q = I × t ∴ Q = (10 × 120) A s = 1200 C
, (ii) Since, Q = ne
where n is the total number of electrons flowing and e is the charge on one electron
∴ 1200 = n × 1.6 × 10-19
or n = 12001.6×10−19 = 7.5 × 1021
Question 2.
Define electric current. (1/5, Board Term 1,2017)
Answer:
Electric current is the amount of charge flowing through a particular area in unit time.
Question 3.
Define one ampere. (1/5, Board Term 1,2015)
Answer:
One ampere is constituted by the flow of one coulomb of charge per second.
1 A = 1 C s-1
Question 4.
Name a device that you can use to maintain a potential difference between the ends of
a conductor. Explain the process by which this device does so. (Board Term I, 2013)
Answer:
A cell or a battery can be used to maintain a potential difference between the ends of a
conductor. The chemical reaction within a cell generates the potential difference across
the terminals of the cell, even when no current is drawn from it. When it is connected to
a conductor, it produces electric current and, maintain the potential difference across
the ends of the conductor.
Question 5.
Draw the symbols of commonly used components in electric circuit diagrams for
(i) An electric cell
(ii) Open plug key
(iii) Wires crossing without connection
(iv) Variable resistor
(v) Battery
(vi) Electric bulb
(vii) Resistance (4/5, Board Term 1,2017)
