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  1. Problems
  2. /Electricity & Magnetism
  3. /Current Electricity

Current Electricity

Physics
+ Upload a Problem
More in Electricity & MagnetismElectrostaticsElectric Potential and CapacitanceCurrent ElectricityMagnetic Effects of CurrentElectromagnetic InductionAlternating Current
48 problems
Type:
1.
A kitchen circuit at 220 V has a 15 A fuse.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Hard
2.
The live and neutral wires of a 220 V supply touch where the insulation is worn.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
3.
An electric iron has a metal body and a three-pin plug.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Easy
4.
A 15 A circuit at 220 V has a refrigerator of 200 W, an iron of 1100 W and a geyser of 1800 W, all…
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
5.
A kitchen on a 220 V supply has a kettle of 1500 W, a toaster of 800 W and a refrigerator of 200 W…
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Hard
6.
Every day a family uses: a fan of 60 W for 10 hours, a tube light of 36 W for 6 hours, a television…
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Hard
7.
A filament bulb of 40 W and a LED bulb of 6 W give about the same light.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
8.
A 40 W tube light works for 9 hours every day.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
9.
A heater of 1250 W works for 2 hours. How many units does it use? How many joules is this?
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Easy
10.
A 200 W and a 50 W bulb, both for 220 V, are joined in series to a 220 V supply.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Hard
11.
A bulb is marked 220 V, 40 W. Find the current it takes at 220 V.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
12.
A heater is marked 1320 W for a 220 V supply.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
13.
An appliance takes 0.75 A from a 230 V supply.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Easy
14.
A refrigerator of 450 W works on a 230 V supply. Which fuse suits it: 3 A, 13 A or 30 A? Explain.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
15.
A filament of 500 Ω and its connecting wires of 0.5 Ω in all carry the same 0.4 A.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
16.
A 230 V supply is joined to a 92 Ω resistor for two minutes.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
17.
A heater coil has a resistance of 40 Ω and carries a current of 2.5 A.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Easy
18.
You have three 7 Ω resistors. Using all three each time, find the combined resistance when all are…
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Hard
19.
An 8 Ω and a 24 Ω resistor are in parallel, and this pair is in series with a 4 Ω resistor.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Hard
20.
A 60 W bulb and a 1000 W heater are both on a 220 V house supply.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Easy
21.
Resistors of 12 Ω, 24 Ω and 24 Ω are in parallel across a 6 V battery.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
22.
A 9 Ω and a 36 Ω resistor are joined in parallel to a 27 V battery.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
23.
A string of 20 identical lamps is joined in series to a 220 V supply.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Easy
24.
A bulb of 7 Ω and a bulb of 11 Ω are joined in series to a 9 V battery.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Medium
25.
Resistors of 4 Ω, 6 Ω and 10 Ω are joined in series with an 8 V battery.
High School (9–10) · Current ElectricityStemPy LabStemPy Lab
Easy
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