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Current Electricity Essentials
JEE Physics • 10 questions • Free on ExamBattle
Practice Questions
Q1
The resistance of a wire is directly proportional to its:
- A. Cross-sectional area
- B. Length
- C. Volume
- D. Mass
Q2
Three resistors of 6 Ω each are connected in parallel. The equivalent resistance is:
- A. 18 Ω
- B. 2 Ω
- C. 6 Ω
- D. 3 Ω
Q3
The SI unit of electrical resistivity is:
- A. Ω
- B. Ω·m
- C. Ω/m
- D. Ω·m²
Q4
The power dissipated in a 10 Ω resistor carrying 3 A current is:
- A. 30 W
- B. 90 W
- C. 300 W
- D. 9 W
Q5
In a Wheatstone bridge, the condition for balance is:
- A. P + Q = R + S
- B. P/Q = R/S
- C. PQ = RS
- D. P - Q = R - S
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