Adaptive Practice
Electricity
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Question 1 of 10
⏱ 0:30
Easy
What is the SI unit of electric current?
Easy
Two resistors of 4 Ω and 6 Ω are connected in series. What is the total resistance?
Medium
If a wire of length L and cross-sectional area A has resistance R, what will be the resistance of a wire of length 2L and area 2A made of the same material?
Easy
In an electric circuit, the potential difference across a resistor is 12 V and the current through it is 3 A. What is the power dissipated?
Medium
What is the equivalent resistance between points A and B for two resistors 5 Ω and 10 Ω connected in parallel?
Medium
A battery of emf 12 V and internal resistance 1 Ω is connected to a resistor of 5 Ω. What is the terminal voltage of the battery?
Easy
Which of the following materials has the highest electrical conductivity?
Hard
A wire of resistance 8 Ω is stretched to double its length. What is the new resistance?
Easy
In an Indian household, if the current drawn is 5 A at 230 V, what is the power consumption?
Hard
A conductor has a resistivity of 1.7 × 10⁻⁸ Ω·m. What is the resistance of a copper wire 2 m long and 1 mm² in cross-sectional area?