Q. Which one of the following gemstones contains beryllium metal?
1) Topaz
2) Emerald
3) Ruby
4) Blue sapphire
Q. Lowering the atmospheric pressure on a liquid -
1) Increases the boiling point of the liquid
2) Lowers the boiling point of the liquid
3) Does not affect the boiling point of the liquid
4) Increases the time required for it to boil
Q. The number of angular and radial nodes for 4d orbital is respectively -
1) 2 and 1
2) 1 and 2
3) 3 and 1
4) 4 and 0
Q. If the amplitude of oscillation of a simple pendulum is very small, then its time period of oscillation -
1. depends one the length of the pendulum, L
2. depends on the acceleration due to gravity, g
3. depends upon the mass of the bob of the pendulum, m
4. does not depend upon the amplitude of the pendulum, A
Select the correct answer using the code given below.
1) 1, 2 and 3
2) 1, 2 and 4
3) 2, 3 and 4
4) 1 and 4 only
Q. The term LASER stands for -
1) Light Amplification by Stimulated Emission of Radiation
2) Light Amplification by Spontaneous Emission of Radiation
3) Light Amplification by Stimulated Emission of Rays
4) Light Amplification by Stimulated Energy of Radiation
Q. Which one of the following processes is not a part of longwave radiation?
1) Conduction
2) Scattering
3) Convection
4) Radiation
Q. The quantum theory of light was given by :
1) Newton
2) Faraday
3) Plank
4) Einstein
Q. A force of 20N displaces an object through 2 m and does a work of 20J. The angle between the force and displacement is:
1) 90°ree;
2) 30°ree;
3) 60°ree;
4) 0°ree;
Q. Ice floats on water because its density is:
1) more than water
2) less than water
3) zero
4) same as water
Q. In which of the following examples will an athlete have maximum accelerated motion?
1) Running on a rectangular track
2) Running on a hexagonal track
3) Running on an octagonal track
4) Running on a circular track
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