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SSC CGL Exam General Awareness Study Material

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Physics

How many neutrons are there in ₉₂U²³⁸ atom ?

a) 92
b) 238
c) 146
d) 330

✔Answer

✔Solution

Correct Answer Is : 146

Solution Is : The atomic mass of Uranium ₉₂U²³⁸ = 238; the number of protons (p) = 92 = number of electrons (e). Since atomic mass (A) = p + n, A= 238 = 92 + n So, n = 238 - 92 = 146.

Root pressure is measured by

a) Barometer
b) Ammeter
c) Manometer
d) Auxanometer

✔Answer

✔Solution

Correct Answer Is : Auxanometer

Solution Is : Root pressure is measured by an instrument called an auxanomaeter. The auxanometer measures plant growth as well as the pressure developed within the xylem cells of roots.

The process of imbibition involves

a) Diffusion
b) Capillary action
c) Absorption
d) Both (1) and (2)

✔Answer

✔Solution

Correct Answer Is : Absorption

Solution Is : The uptake or absorption of water by the solid substance without forming a solution is called imbibition. The substances absorbing water are called imbibants which do not dissolve in water. It is the initial step in the germination of the seeds.

The work done by the string of a simple pendulum during one complete oscillation is equal to

a) Total energy of the pendulum
b) Kinetic energy of the pendulum
c) Potential energy of the pendulum
d) Zero

✔Answer

✔Solution

Correct Answer Is : Zero

Solution Is : The work done by the string of a simple pendulum during one complete oscillation is equal to Total energy of the pendulum.

The minimum number of forces to keep a particle in equilibrium is

a) 1
b) 2
c) 3
d) 4

✔Answer

✔Solution

Correct Answer Is : 2

Solution Is : The minimum number of forces to keep a particle in equilibrium is 2.

A system exhibiting S.H.M. must possess

a) Elasticity as well as Inertia
b) Elasticity, Inertia and external force
c) Elasticity only
d) Inertia only

✔Answer

✔Solution

Correct Answer Is : Elasticity as well as Inertia

Solution Is : A system exhibiting S.H.M. must possess Elasticity as well as Inertia.

A needle or a pin floats on the surface of water because of

a) Surface tension
b) Surface Energy
c) Viscosity
d) Adhesive force

✔Answer

✔Solution

Correct Answer Is : Surface tension

Solution Is : A needle or a pin floats on the surface of water because of Surface tension.

The wire of flash bulbs is made up of

a) Mg
b) Ba
c) Cu
d) Ag

✔Answer

✔Solution

Correct Answer Is : Mg

Solution Is : The wire of flash bulbs is made up of Mg.

Q.Which of the following has the highest penetrating power?

a) ?-ray
b) ?-ray
c) ?-ray
d) ? -ray

✔Answer

✔Solution

Correct Answer Is : ?-ray

Solution Is : ?-ray has the highest penetrating power.

Hertz is a unit for measuring

a) Intensity of waves
b) Frequency of waves
c) Wavelength
d) Clarity of waves

✔Answer

✔Solution

Correct Answer Is : Frequency of waves

Solution Is : Hertz is the unit of frequency of waves in the international system of units. It is defined as one cycle per second. It is named for Hein rich Rudolf hertz, the first person to provide conclusive proof of the existence of electromagnetic waves.

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SSC CGL Exam General Awareness Study Material

Physics

How many neutrons are there in 92U238 atom ?

Correct Answer Is : 146

Solution Is : The atomic mass of Uranium 92U238 = 238; the number of protons (p) = 92 = number of electrons (e). Since atomic mass (A) = p + n, A= 238 = 92 + n So, n = 238 - 92 = 146.

Root pressure is measured by

Correct Answer Is : Auxanometer

Solution Is : Root pressure is measured by an instrument called an auxanomaeter. The auxanometer measures plant growth as well as the pressure developed within the xylem cells of roots.

The process of imbibition involves

Correct Answer Is : Absorption

Solution Is : The uptake or absorption of water by the solid substance without forming a solution is called imbibition. The substances absorbing water are called imbibants which do not dissolve in water. It is the initial step in the germination of the seeds.

The work done by the string of a simple pendulum during one complete oscillation is equal to

Correct Answer Is : Zero

Solution Is : The work done by the string of a simple pendulum during one complete oscillation is equal to Total energy of the pendulum.

The minimum number of forces to keep a particle in equilibrium is

Correct Answer Is : 2

Solution Is : The minimum number of forces to keep a particle in equilibrium is 2.

A system exhibiting S.H.M. must possess

Correct Answer Is : Elasticity as well as Inertia

Solution Is : A system exhibiting S.H.M. must possess Elasticity as well as Inertia.

A needle or a pin floats on the surface of water because of

Correct Answer Is : Surface tension

Solution Is : A needle or a pin floats on the surface of water because of Surface tension.

The wire of flash bulbs is made up of

Correct Answer Is : Mg

Solution Is : The wire of flash bulbs is made up of Mg.

Q.Which of the following has the highest penetrating power?

Correct Answer Is : ?-ray

Solution Is : ?-ray has the highest penetrating power.

Hertz is a unit for measuring

Correct Answer Is : Frequency of waves

Solution Is : Hertz is the unit of frequency of waves in the international system of units. It is defined as one cycle per second. It is named for Hein rich Rudolf hertz, the first person to provide conclusive proof of the existence of electromagnetic waves.

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How many neutrons are there in ₉₂U²³⁸ atom ?

Solution Is : The atomic mass of Uranium ₉₂U²³⁸ = 238; the number of protons (p) = 92 = number of electrons (e). Since atomic mass (A) = p + n, A= 238 = 92 + n So, n = 238 - 92 = 146.