JEE Main questions
34568 published questions with worked solutions.
- The dimensional formula of latent heat is:
- The volume of an ideal gas (γ = 1.5) is changed adiabatically from 5 litres to 4 litres. The ratio of initial pressure to final...
- The energy equivalent of 1 g of substance is:
- An astronaut takes a ball of mass m from earth to space. He throws the ball into a circular orbit about earth at an altitude of...
- Given below are two statements: Statement (I): When currents vary with time, Newton's third law is valid only if momentum carried...
- A particle of mass m moves on a straight line with its velocity increasing with distance according to the equation v = x, where α...
- A galvanometer has a coil of resistance 200 Ω with a full scale deflection at 20 μA. The value of resistance to be added to use...
- One main scale division of a vernier caliper is equal to m units. If nth division of main scale coincides with (n + 1)ᵗʰ division...
- A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the...
- At the centre of a half ring of radius R = 10 cm and linear charge density 4n C m⁻¹, the potential is x π V. The value of x is...
- A star has 100% helium composition. It starts to convert three ⁴He into one ¹²C via triple alpha process as ⁴He + ⁴He + ⁴He → ¹²C...
- In a Young's double slit experiment, the intensity at a point is (1/4)ᵗʰ of the maximum intensity, the minimum distance of the...
- A string is wrapped around the rim of a wheel of moment of inertia 0.40 kgm² and radius 10 cm. The wheel is free to rotate about...
- Two persons pull a wire towards themselves. Each person exerts a force of 200 N on the wire. Young's modulus of the material of...
- When a coil is connected across a 20 V dc supply, it draws a current of 5 A. When it is connected across 20 V, 50 Hz ac supply,...
- The position, velocity and acceleration of a particle executing simple harmonic motion are found to have magnitudes of 4 m, 2...
- Methods used for purification of organic compounds are based on :
- In which one of the following pairs the central atoms exhibit sp² hybridization ?
- Relative stability of the contributing structures is : (I) CH₂=CH–C(=O)–H (neutral structure) (II) ⁺CH₂–CH=C(H)–O⁻ (III)...
- Given below are two statements : Statement (I) : The oxidation state of an element in a particular compound is the charge...