JEE Main Physics Test- 1 - JEE MCQ

A microscope has its main scale with 20 divisions in 1 cm and vernier scale with 25 divisions, the length of which is equal to the length of 24 divisions of main scale. The least count of microscope is:

A gardener pushes a lawn roller through a distance of 20m. If he applies a force of 20 kg weight in a direction inclined at 60° to the ground, find the work done by him. (g=9.8m/s2)

A particle collides with another particle such that the second particle starts moving and the first particle stops just after the collision. Then which of the following conditions must always be valid (m/M= ratio of masses)

One kilometer is equal to how many miles?

If two numerically equal forces P & P acting at a point produce a resultant force of magnitude P itself, then the angle between the two original forces is

The angular velocity (in rad/s) of a body rotating at N r.p.m. is

An object with a mass of 10kg moves at a constant velocity of 10m/s. A constant force then acts for 4 sec on the object and gives it a speed of 2m/sec in opposite direction. The acceleration produced in it is

Three blocks of masses M₁,M₂ & M₃ are connected by mass-less strings as shown on a friction-less table. They are pulled with a forceT₃=40 N. If M₁=10kg, M₂ = 6kg, M₃ = 4kg   then TensionT₂ will be:

Collision between two carom coins is an example for

The density of material in CGS system of units is 4g/ cm³.In a system of units in which unit of lengths is 10 cm and unit of mass is 100 g, the value of density of material will be 

A person is holding a bucket by applying a force of 10N. He moves a horizontal distance of 5m and then climbs up a vertical distance of 10m. Find the total work done by him

On the basis of dimensional equation, the maximum number of unknown that can be found, is

Two blocks of masses M = 5 kg and m = 3 kg are placed on a horizontal surface as shown in  this Fig. The coefficient of friction between the blocks is 0.5 and that between the block M and the horizontal surface is 0.7 . What is the maximum horizontal force F that can be applied to block M so that the two blocks move without slipping ?Take g = 10 ms

A particle is projected up a 45° rough incline with a velocity 'v'. The coefficient of friction is 0.5 the speed with which it returns back to the starting point is v¹ then v¹/v is

A stone is projected upwards from the top of a building with some initial speed and reaches the ground in 5 sec. Now it is allowed to fall with the same initial speed downwards and reaches the ground in 3 sec. If the stone is allowed to fall freely under gravity from the same point, it will reach the ground in

 If radian correction is not considered in specific heat measurement. The measured value of specific heat will be

Let the resultant of three forces of magnitude 5N, 12N, & 13N acting on a body be zero. If sin23° = 5/13, then angle between 5N & 13 N force (in degree) will be:

A very large number of balls are thrown vertically upwards in quick succession in such a way that the next ball is thrown when the previous one is at maximum height 5 m. Then number of balls thrown per minute will be :-

A smooth wire of length 20π m is bent in to a circle and kept in a vertical plane. A bead can slide smoothly on the wire. When the circle is rotating with angular speed ω about the vertical diameter AB, as shown in figure, the bead is at rest with respect to the circular ring at position p as shown. Then the value of √3(ω²) will be:-

A block of mass m is placed at the distance of 1m from the centre of a round turn table (A table whose surface can rotate about central axis). Table starts from rest and rotates with constant angular acceleration of 3 rad/s². The coefficient of friction between block and table is µ = 0.5. At time t = x/3 sec from the start of motion the block is just about to slip. Find value of x.

A block of mass 2 kg is suspended from a string, is released from a height of 5m as shown in figure then what will be the impulse when string. Just becomes tight