Sources of Electric Current Quiz - CBSE Class 6 Science
Free practice quiz: Sources of Electric Current (CBSE Class 6 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.
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Which of the following is a natural source of electric current?
- Solar energy
- Battery
- Electromagnet
- Bulb
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Answer: A. Solar energy
Solar energy can be converted into electric current using solar panels, making it a natural source.
How does a generator produce electricity?
- By using a battery
- By spinning a coil in a magnetic field
- By burning fuel
- By using solar panels
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Answer: B. By spinning a coil in a magnetic field
A generator produces electricity by converting mechanical energy into electrical energy through electromagnetic induction.
If you were to calculate the total energy produced by a solar panel, what factors would you need to consider?
- Size, sunlight, and type of panel
- Weight and height
- Color and shape
- Distance to the sun
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Answer: A. Size, sunlight, and type of panel
The energy output of a solar panel depends on its size, the amount of sunlight it receives, and the efficiency of the type of panel used.
If an electric circuit has a 12-volt battery and a total resistance of 4 ohms, what is the electric current flowing through the circuit?
- 3 Amperes
- 4 Amperes
- 12 Amperes
- 48 Amperes
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Answer: A. 3 Amperes
Using Ohm's Law (I = V/R), the current I is calculated as 12 volts / 4 ohms = 3 Amperes.
If a parallel circuit has two branches with resistors of 4 ohms and 6 ohms, what is the equivalent resistance?
- 2.4 ohms
- 10 ohms
- 24 ohms
- 12 ohms
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Answer: A. 2.4 ohms
The formula for equivalent resistance in parallel is 1/R_total = 1/R1 + 1/R2, so 1/R_total = 1/4 + 1/6 can be solved to get R_total = 2.4 ohms.