The first reflecting telescope was built by:

In the Compton Effect, a photon of wavelength λ collides with a stationary electron. The wavelength of the emitted photon is:

A string of length L is fixed between two points. If a standing wave of 5 nodes is produced, what is the relationship between the string's length, L, and its wavelength?

Rounded to the nearest day, one mercurial year is equal to:

According to Kepler's Laws, the cube of the mean distance of a planet from the sun is proportional to the:

With reference to nuclear energy production, what is the use of boiling water in a boiling water reactor (BWR)?
1. As a coolant
2. As a neutron moderator
Select the correct option from the codes given below:

Carlos is pulling a 40-kilogram cart with a horizontal force of 100 Newtons. The force of friction on the cart is 20 Newtons. The acceleration of the cart is:

A 5 kilogram mass is lifted at constant velocity from a shop floor by a rope that passes through a pulley attached to the shop's ceiling. Neglecting the mass of the rope and friction in the pulley, what is the approximate tension in the rope?

Rest mass energy of an electron is

Which of the following is correct about magnetic field lines?

The Andromeda Galaxy is which of the following types of galaxies?

A space ship traveling toward Mars at 0.6 times the speed of light c shoots an ELECTRON beam at Mars. If the electrons travel at 0.6 C RELATIVE TO THE SPACE SHIP, at what speed do the electrons impact the surface of Mars?

What is the hydrostatic pressure at the bottom of a pool 6 meters deep?

With reference to the phase changes in matter, which of the following is / are correct statements?

1. When a liquid freezes, it releases thermal energy into its immediate environment.
2. When a solid melts, it releases thermal energy into its immediate environment.
3. When a solid melts, its temperature increases

Select the correct option from the codes given below:

At a point halfway between two identical point charges, the electric field is equal to:

The same side of the moon always faces the Earth because:

The shape of magnetic field around a long straight current-carrying wire is:

Which of the following statements with respect to the speed of light in various media is/are correct?

1. It is greater in vacuum in comparison to glass
2. It is greater in hot glass in comparison to a cold glass

Select the correct option from the codes given below:

The electric field of a point charge varies:

An electron is classified as a

If the resultant force acting on a body of constant mass is zero, the body's acceleration is:

The cosmic background radiation, a remnant of the Big Bang, is at what temperature?

A man picks up a 50-kilogram block and carries it up a flight of stairs 10 meters high. He then carries the block back down the stairs and places the block in its original position. What is the NET work done on the block?

A 10-kilogram object falls from a cliff 100 meters high. At the midpoint of its fall its total energy is:

The oxygen in the earth's atmosphere was probably produced by which of the following?

The period from one full moon to the next is:

What is the relation between Time period(T) and angular frequency(ω) of a wave?

If you were watching a star collapsing to form a black hole, the light would disappear because of the light:

A Pendulum Clock, whose pendulum is made up of a steel rod, will become slow if __:

1. Temperature rises
2. Taken from the equator to the pole
3. Taken to moon

Two bodies each have a mass M. If the mass of each body is doubles, the gravitational force of attraction between the two bodies will be:

The angle between the velocity and acceleration of a body is:

A hiker stands at the bottom of a steep hill. The hiker may follow a straight-line path to the top of the hill, a distance of 300 feet, or she may follow a zig-zag path to the top of the hill and walk a distance of 600 feet. The work done by the force of gravity along the zig-zag path is how many times is the work going along the straight path?

Of the following, the most energetic form of NON-IONIZING radiation is

In space, heat is transferred by:

A proton and an alpha particle pass through the gap of a strong magnet. If both particles have the same initial velocity, how many times greater will the defection of the proton be relative to the deflection of the alpha particle?

Consider a car driving around a circular bend in the road. Which of the following CANNOT be constant?

If we look at the floating piece of iceberg on the sea, approximately what fraction of it is visible above the seawater level?

A LED lamp produces 300 lumens of light per watt, which makes it about 20 times as efficient as an incandescent lamp and four times as efficient as the fluorescent tube. What is the reason for this?

The principle that energy may be converted from one form to another but it cannot be either created or destroyed is:

The dominant charge carriers in p-type semiconductors are

What reflecting surface forms a geometrically perfect image of a point source located at infinity (such as that approximated by a star)?

Which of the following is NOT an example of capillary action?

What percentage of the earth's atmosphere does O2 comprise(Approx.)?

Light bends around sharp corners as a result of

The Grand Unified Theory of the forces of nature combines three of the four forces. Which force is NOT included?

For the hydrogen atom, which series describes electron transitions to the N = 2 orbit? Is it the:

Which of the following is NOT closely associated with a non-magnetic Phase Diagram?

The magnitude of the quarks' electric charge is

Which of the following is the most important erosional and transportation agent?

The dimensions of gravitational constant G are:

Which one of the following laws best describes the operation of an electric generator?

A projectile is fired into the air at an angle of 23 degrees. At what other angle would this projectile have the same range if air resistance is neglected?

A girl throws a 2-kilogram rock vertically upward. It reaches a maximum height of 5 meters. What is the kinetic energy of the rock the instant it leaves the girl's hand?

An electron is moved through a potential difference of 1 volt. How much energy in joules was used to move the electron?

Which of the following will increase the ANGULAR MOMENTUM of a person spinning on a rotatable frictionless bar chair?

How many atoms per unit cell are in a face-centered-cubic crystal?

Which civilization developed and implemented the first solar calendar?

Planck's constant was first introduced in order to obtain a correct theoretical prediction of

At a point directly east of a negative point charge, the electric field points in what direction?

Two identical resistors are connected in parallel and consume 200 watts together. A third identical resistor is added in parallel. The total power consumed is:

The index of refraction of a material is 1.5. The speed of light in this material relative to that in a vacuum is:

Echoes are heard when we shout in an empty hall. But when the hall is full of people no echoes are heard why?

What is/are the objectives of using tubeless tires in aircraft?

1. To reduce chances of detaching the tire from the rim
2. To make them withstand shocks better
3. To allow them to withstand heat.

Select the correct option from the codes given below:

For a body to be in equilibrium, which of the following conditions must exist?

Two point masses, M1 and M2, are 14 centimeters apart. M1 has a mass of 2 grams. M2 has a mass of 5 grams. Locate the center of mass of this system.

At one atmosphere, a cylinder with movable piston contains 2,000 milliliters of gas. If the pressure is increased to 5 atmospheres and the temperature remains unchanged, what is the new volume of the gas?

The Doppler Effect predicts that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This particular shift is known as the:

What happens to the period of a pendulum if the mass of the bob is quadrupled?

An automobile needs an antenna for its radio to play properly because:

The working of a jet airplane is based on