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SRMJEE Mock Test (Med) - 13 - JEE MCQ


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30 Questions MCQ Test SRMJEEE Subject Wise & Full Length Mock Tests 2024 - SRMJEE Mock Test (Med) - 13

SRMJEE Mock Test (Med) - 13 for JEE 2024 is part of SRMJEEE Subject Wise & Full Length Mock Tests 2024 preparation. The SRMJEE Mock Test (Med) - 13 questions and answers have been prepared according to the JEE exam syllabus.The SRMJEE Mock Test (Med) - 13 MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for SRMJEE Mock Test (Med) - 13 below.
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SRMJEE Mock Test (Med) - 13 - Question 1

The ratio of secondary to the primary turns in a transformer is 3:2 and the output power is P. Neglecting all power losses, the input power must be

SRMJEE Mock Test (Med) - 13 - Question 2

A radioactive element has half the period 800 yrs. After 6400 years what amount will remain?

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SRMJEE Mock Test (Med) - 13 - Question 3

A step up transformer operates on a 230 volt line and supplies 2 amp to a load. The ratio of primary and secondary windings is 1:25. Determine the primary current .

Detailed Solution for SRMJEE Mock Test (Med) - 13 - Question 3

SRMJEE Mock Test (Med) - 13 - Question 4

A particle of mass m is suspended from a fixed point C by a light string of length a. The particle is projected at right angle to the string with a velocity with which it describes a complete circle is—

SRMJEE Mock Test (Med) - 13 - Question 5

The wire in electrical industry are made of copper, because it is/has

SRMJEE Mock Test (Med) - 13 - Question 6

Threshold wavelength for photoelectric emission from a metal surface is 5200 Å. Photoelectrons will be emitted when this surface is illuminated with monochromatic radiation from

SRMJEE Mock Test (Med) - 13 - Question 7

The extension of a wire by the application of load is 3 mm. The extension in a wire of the same material and length but half the radius by the same load is

SRMJEE Mock Test (Med) - 13 - Question 8

If a solid state power supply having voltage regulation 25% has full load voltage of 20V, what will be its no-load voltage?

SRMJEE Mock Test (Med) - 13 - Question 9

A body from height h is dropped. If the coefficient of restitution is e, then calculate the height achieved after one bounce.

Detailed Solution for SRMJEE Mock Test (Med) - 13 - Question 9

When a body falls from a height h, it strikes the ground with a velocity μ = √2gh Let it rebounds with a velocity v and rise to a height h1

If the successive heights to which the body rebounds again and again are h2, h3,...., then

Clearly, h1 = e2 h, h2 = e4 h ... and so on. Similarly, after nth rebound
hn = (e2n)h

SRMJEE Mock Test (Med) - 13 - Question 10

A body of 2 gm carrying a charge of 0.1 μ C starts from rest at the positive plate and moves to the negative plate of a parallel plate condenser connected to a voltage supply of 30KV. The final velocity is

SRMJEE Mock Test (Med) - 13 - Question 11

Pulling force making an angle θ to the horizontal is applied on a block of weight W placed on a horizontal table. If the angle of friction is α. then the magnitude of force required to move the body is equal to

SRMJEE Mock Test (Med) - 13 - Question 12

For a gas the difference between the two specific heats is 4150 J/kg K. What is the specific heats at constant volume of gas it the ratio of specific heat is 1.4

SRMJEE Mock Test (Med) - 13 - Question 13

A person is sitting in a travelling train and facing engine. He tosses up a coin and coin falls behind him. It can be concluded that train is

SRMJEE Mock Test (Med) - 13 - Question 14

A moving positively charged particle, enters a region of uniform magnetic field directed vertically upwards. This particle will move

SRMJEE Mock Test (Med) - 13 - Question 15

A bar magnet having a magnetic moment of 2 x 104 J T-1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 x 104 T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60o from the field is:

Detailed Solution for SRMJEE Mock Test (Med) - 13 - Question 15

W = MB cos 60o
= 2 x 104 x 6 x 10-4 x 1/2 = 6J

SRMJEE Mock Test (Med) - 13 - Question 16

R and r are the radii of the earth and moon respectively. ρe and ρm are the densities of earth and moon respectively. The ratio of the accelerations due to gravity on the surfaces of earth to moon is

SRMJEE Mock Test (Med) - 13 - Question 17

A body takes T minutes to cool from 62oC to 61oC when the surrounding temperature is 30oC . The time taken by the body to cool from 46oC to 45.5oC is

Detailed Solution for SRMJEE Mock Test (Med) - 13 - Question 17

According to Newton's law of cooling, - dθ/dt = k(θ - θ0)


SRMJEE Mock Test (Med) - 13 - Question 18

The application of Bernoulli theorem can be seen in

Detailed Solution for SRMJEE Mock Test (Med) - 13 - Question 18

The upper surface of aeroplane wing is more curved than its lower surface, therefore, the speed of air above the wings two is larger than the speed of the air below the wings.
According to Bernoulli’s theorem, the pressure above the wings becomes less than that the pressure below the wings. Due to this difference of pressure on the two sides of the wings, a vertical lift acts on the aeroplane.
When this lift is sufficient to overcome the gravity pull on the aeroplane, the aeroplane is lifted up.

SRMJEE Mock Test (Med) - 13 - Question 19

A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

SRMJEE Mock Test (Med) - 13 - Question 20

A 500 kg car takes a round turn of radius 50 m with a velocity of 36 km−h-1. The centrifugal force acting on the car is

SRMJEE Mock Test (Med) - 13 - Question 21

A rope of length L is pulled by a constant force F. What is the tension in the rope at a distance x from the end where the force is applied

SRMJEE Mock Test (Med) - 13 - Question 22

To make the frequency double of an oscillator, we have to

SRMJEE Mock Test (Med) - 13 - Question 23

A particle of mass m is projected with the velocity ν making an angle of 45o with the horizontal. The magnitude of the angular momentum of the particle about the point of projection when the particle is at its maximum height is (where g = acceleration due to gravity)

SRMJEE Mock Test (Med) - 13 - Question 24

The force F on a sphere of radius 'a' moving in a medium with velocity 'ν' is given by F = 6 π η a ν. The dimension of η are

SRMJEE Mock Test (Med) - 13 - Question 25

The image formed by an objective of a compound microscope is

SRMJEE Mock Test (Med) - 13 - Question 26

A 2 kg mass is rotating on a circular path of radius 0.8 m with angular velocity of 44 rad-s-1 If radius of the path becomes 1 m, then value of angular velocity will be

SRMJEE Mock Test (Med) - 13 - Question 27

Following sets of three forces act on a body. In which case the resultant cannot be zero?

SRMJEE Mock Test (Med) - 13 - Question 28

Small droplets of a liquid are usually more spherical in shape than larger drops of the same liquid because

SRMJEE Mock Test (Med) - 13 - Question 29

A cell of constant electromotive force (E) produces an equal amount of heat during the same time in two independent resistances R₁ and R₂, when connected separately one after the other across the cell. The internal resistance (r) of the cell is

SRMJEE Mock Test (Med) - 13 - Question 30

A heat engine is a device

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