Level 2 questions · free, no signup
Level 2.One step past the obvious.
Each Level 2 starts from a quick question (Level 1) and changes one thing. Seeing what that change does is what JEE Main tests. Pick a chapter, try one, then check the worked answer. Free, with no signup.
Mechanics
- Level 1: Helium Balloon in an Accelerating Car: Back or Forward?Level 2: The toy hanging from the mirror.
- Level 1: Truck vs Bike, Same Momentum, Same Brakes: Who Stops First?Level 2: Who travels farther before stopping?
- Level 1: Double the Wind Speed: Windmill Power ×4?Level 2: A water jet hitting a wall.
- Level 1: Frictionless Loop of Radius R: Is a 2R Start Enough?Level 2: A rolling ball instead of a cart.
- Level 1: Hinged Ruler Released From Level: Does Its End Fall Faster Than g?Level 2: Find the point that falls at exactly g.
- Level 1: Pull a Cotton Reel's Thread: Which Way Does It Roll?Level 2: Tilt the thread upward.
- Level 1: Same Curve, Twice the Speed: Twice the Grip?Level 2: Bank the road so you need no grip.
- Level 1: A Rope Holds Twice Your Weight: Is a Swing From Level Safe?Level 2: Start the swing from sixty degrees.
- Level 1: At the Top of a Throw the Ball Stops. Is Its Acceleration Zero?Level 2: Throw it at an angle, and find the curve at the top.
- Level 1: Rubber Bullet vs Lead Bullet: Which Pushes the Block Harder?Level 2: How much energy vanishes when it sticks?
- Level 1: When You Walk, Which Way Does Friction Push?Level 2: A box riding on a truck.
- Level 1: Fired Sideways at Escape Speed: Does It Still Escape?Level 2: From orbit, how much faster to escape?
- Level 1: At What Height Is Your Weight Halved?Level 2: Dig down. At what depth?
- Level 1: 2% Error in a Ball's Radius: How Big Is the Volume Error?Level 2: Find g from a pendulum.
Properties of matter
Heat and thermodynamics
Oscillations and waves
- Level 1: A Pendulum Clock on the Space Station: Does It Run Slow?Level 2: Send up a spring clock instead.
- Level 1: A Child Stands Up on a Swing: Does the Period Change?Level 2: A swinging rod against a pendulum.
- Level 1: Pendulum: Middle to End in 0.6 s. Middle to Halfway?Level 2: Halfway out on both sides.
- Level 1: Close One End of an Open Pipe: Does the Note Go Up?Level 2: Match the overtones of two pipes.
- Level 1: Does Sound Travel Faster in Dry Air or Humid Air?Level 2: Hydrogen against oxygen.
Electrostatics
Current electricity
- Level 1: A Longer Fuse Wire: Does It Blow at a Lower Current?Level 2: Make the fuse wire twice as thick.
- Level 1: Stretch a 1200 W Heater's Wire to Double Length: New Power?Level 2: Stretch it by just ten percent.
- Level 1: Three Bulbs in Series, One Shorted: Dimmer or Brighter?Level 2: Twenty fairy lights, and one shorts.
- Level 1: One Torch Cell in Backwards: What Voltage Is Left?Level 2: Add each cell's internal resistance.
- Level 1: Remove the Middle Resistor of a Bridge: Does R Change?Level 2: Different resistors. Spot the balance.
- Level 1: Twice as Thick, Same Current: How Fast Do Electrons Drift?Level 2: Which wire has the stronger field inside?
- Level 1: Ammeter Connected Across a Battery by Mistake: What Happens?Level 2: Work out the actual current.
- Level 1: An Old Cell Reads 1.5 V but the Torch Stays Dark: Why?Level 2: Measure the resistance inside it.
- Level 1: Why Are Heater Coils Nichrome, Not Copper?Level 2: How long is the coil?
- Level 1: Why Birds on 11 kV Wires Don't Get ShockedLevel 2: Put a number on the voltage between its feet.
Magnetism and induction
- Level 1: Same Wire, Two Turns Instead of One: Field ×2?Level 2: A circle or a square?
- Level 1: Magnet Into a Coil, Fast vs Slow: Which Sends More Charge?Level 2: Is the heat the same too?
- Level 1: 220 V to 11 V Transformer: Which Coil Has the Thicker Wire?Level 2: Find the current in the 220 volt coil.
- Level 1: Spin a Generator Twice as Fast: Twice the Power?Level 2: Unplug the lamp and keep pedalling.
- Level 1: Can a Magnet Speed Up an Electron?Level 2: A proton against an alpha particle.
Alternating current
Optics
- Level 1: A Concave Mirror Under Water: Does Its Focal Length Change?Level 2: A lens in a liquid of index one point two five.
- Level 1: Slice a Convex Lens Into Two Thin Halves: Focal Length f/2?Level 2: Cut it the other way, along the axis.
- Level 1: Why Are Objects in the Mirror Closer Than They Appear?Level 2: Find where the image of a car is.
- Level 1: Young's Double Slit Under Water: Do the Fringes Get Wider?Level 2: Cover one slit with thin glass.
Modern physics
- Level 1: Is a Fully Charged Phone Heavier Than a Flat One?Level 2: The mass missing from a helium nucleus.
- Level 1: Hydrogen's Electron Moves to Orbit 2: Twice as Long per Lap?Level 2: Its magnetic field at the nucleus.
- Level 1: A Cricket Ball Is a Wave Too: Why No Diffraction?Level 2: An electron against a proton.
- Level 1: Is n-Type Silicon Negatively Charged?Level 2: Which side of a p-n junction is higher?
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Tests marked like the real exam, and a worked explanation for every question.