Practice Section
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Level 01
🟢 Easy — CBSE Board Level
Build confidence first. These are direct formula and definition questions.
Q1 · Easy
The capacitance of a capacitor is 2μF and it is connected to a 100V battery. The charge stored on it is:
Q2 · Easy
Three capacitors of 2μF, 3μF, and 6μF are connected in series. The equivalent capacitance is:
Q3 · Easy
The energy stored in a 4μF capacitor charged to 10V is:
Q4 · Easy
A parallel plate capacitor has area A and separation d. If the separation is doubled, the capacitance:
Level 02
🟡 Medium — NEET / JEE Main Level
Q5 · Medium
A capacitor is charged to V₀ with battery connected. A dielectric K=4 is inserted. Which combination correctly describes the new state?
(Ratio = New/Old)
(Ratio = New/Old)
Q6 · Medium
C₁=6μF and C₂=3μF are connected in series with a 9V battery. The voltage across C₂ is:
Q7 · Medium
Two identical capacitors C₁=C₂=C, one charged to V₀ and other uncharged, are connected in parallel. The energy lost is:
Q8 · Medium
In an RC circuit, R=500Ω, C=4μF. The time constant is:
Level 03
🔴 Hard — JEE Advanced Level
These will challenge you. If you get these right, you're ready for JEE Advanced.
Q9 · Hard
In a Wheatstone bridge circuit of capacitors: C₁=2μF, C₂=4μF, C₃=1μF, C₄=2μF, bridge C₅=5μF, battery=10V. Find charge on C₅.
Q10 · Hard
A 10μF capacitor is charged to 100V. The battery is removed. A 40μF uncharged capacitor is connected in parallel. The fraction of energy lost as heat is:
Q11 · Hard
Battery disconnected, then plate separation halved. Which is true?
(Treat as single-select: which one MUST be true)
(Treat as single-select: which one MUST be true)
Q12 · Hard
A parallel plate capacitor (d=8mm, A=0.01m²) has a conducting slab of thickness 4mm inserted. The capacitance (in pF) is approximately:
Your Performance Analysis