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Class 10 Magnetic Effects of Electric Current worksheet
CBSE Science. Field lines, right-hand thumb rule, Fleming's left-hand rule, solenoids, household circuits. 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 wire carrying a current towards the east lies in a magnetic field pointing north. The force on the wire is:
- vertically upwards
- vertically downwards
- east
- south
Answer
(a) vertically upwards
Fleming's left-hand rule: forefinger along the field, middle finger along the current, thumb gives the force
- 2.
A horizontal wire carries a current towards the south. A small compass is placed just above the wire. The north pole of the needle points:
- vertically upwards
- vertically downwards
- west
- east
Answer
(c) west
right-hand thumb rule: thumb along the current, curled fingers give the field
- 3.
An LED bulb rated 22 W is used on the 220 V household supply. The current it draws is:
- 0.1 A
- 0.2 A
- 10 A
- 1.1 A
Answer
(a) 0.1 A
I = P ÷ V = 22 ÷ 220
Section B · short answer
- 4.
A straight conductor carries a current towards the south in a magnetic field pointing vertically upwards. Find the direction of the force on it, and name the rule you used.
Answer
West; Fleming's left-hand rule
forefinger: field; middle finger: current; thumb: force
- 5.
A microwave oven (1,320 W) and an electric iron (1,100 W) are switched on together on a 220 V circuit with a 15 A fuse. Find the current. Will the fuse blow?
Answer
11 A; no, it is within 15 A
I = (1,320 + 1,100) ÷ 220
Section C · long answer
- 6.
A house has a ceiling fan (110 W), a room heater (2,200 W), a microwave oven (1,320 W), a water heater (1,980 W) on a 220 V supply. (a) Find the total current when all are on. (b) Choose the smallest fuse from 5, 10, 15, 20, 25 and 30 A that will not blow. (c) Why are they connected in parallel?
Answer
(a) 25.5 A; (b) 30 A; (c) each gets 220 V and can be switched on and off separately
I = 5,610 ÷ 220
Fresh sheets for your child
In the app, every Magnetic Effects of Electric Current 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.
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