JEE Main questions
34495 published questions with worked solutions.
- The current voltage relation of diode is given by I = (e^ 1000V/T - 1) mA, where the applied voltage V is in volts and the...
- A pipe of length 85 cm is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose...
- In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1 kW. The voltage of the...
- Four particles, each of mass M and equidistant from each other, move along a circle of radius R under the action of their mutual...
- From a tower of height H, a particle is thrown vertically upwards with a speed u. The time taken by the particle, to hit the...
- A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?
- A parallel plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric of dielectric...
- A particle moves with simple harmonic motion in a straight line. In first s, after starting from rest it travels a distance a and...
- During the propagation of electromagnetic waves in a medium -
- Three rods of Copper, Brass and Steel are welded together to form a Y-shaped structure. Area of cross-section of each rod = 4...
- Hydrogen ( _1 H ^1), Deuterium ( _1 H ^2), singly ionised Helium ( _2 He ^4)^+ and doubly ionised lithium ( _3 Li ^6)^ ++ all...
- When a rubber-band is stretched by a distance x, it exerts a restoring force of magnitude F = ax + bx^2 where a and b are...
- A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1m 1000 times. Assume that the potential...
- A satellite is revolving in a circular orbit at a height 'h' from the earth's surface (radius of earth R; h << R). The minimum...
- A pendulum clock loses 12 s a day if the temperature is 40°C and gains 4s a day if the temperature is 20°C. The temperature at...
- An ideal gas undergoes a quasi static, reversible process in which its molar heat capacity C remains constant. If during this...
- A particle performs simple harmonic motion with amplitude A. Its speed is trebled at the instant that it is at a distance 2A 3...
- A uniform string of length 20m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts...
- The temperature dependence of resistances of Cu and undoped Si in the temperature range 300-400 K, is best described byNot in JEE Advanced syllabus
- Two identical wires A and B, each of length 'ℓ', carry the same current I. Wire A is bent into a circle of radius R and wire B is...