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Class 10 Electricity worksheet
CBSE Science. Ohm's law, series and parallel resistors, power, heating effect. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
A charge of 88 C flows through a wire in 22 s. The current is:
- 0.25 A
- 1,936 A
- 5 A
- 4 A
Answer
(d) 4 A
I = Q ÷ t = 88 ÷ 22
- 2.
A current of 10 A flows through a 37 Ω resistor. The potential difference across it is:
- 370 V
- 47 V
- 3.7 V
- 3700 V
Answer
(a) 370 V
V = IR = 10 × 37
- 3.
A potential difference of 8 V drives a current of 4 A through a conductor. Its resistance is:
- 4 Ω
- 32 Ω
- 6 Ω
- 2 Ω
Answer
(d) 2 Ω
R = V ÷ I = 8 ÷ 4
Section B · short answer
- 4.
How many electrons make up a charge of 19 C? (Charge on an electron = 1.6 × 10⁻¹⁹ C)
Answer
1.1875 × 10²⁰
19 ÷ (1.6 × 10⁻¹⁹) = 1.1875 × 10²⁰
- 5.
Find the resistance of a wire 1 m long with a cross-section of 2 mm², made of a material of resistivity 10 × 10⁻⁸ Ω m. (Give the answer to 2 decimal places where needed.)
Answer
0.05 Ω
R = ρL/A = (10 × 10⁻⁸ × 1) ÷ (2 × 10⁻⁶)
Section C · long answer
- 6.
An electric kettle is rated 1,320 W at 220 V. Find the current it draws and its resistance. (Give the answer to 2 decimal places where needed.)
Answer
6 A; 36.67 Ω
I = P ÷ V = 1320 ÷ 220; R = V² ÷ P = 220² ÷ 1320
Fresh sheets for your child
In the app, every Electricity sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.