General Science - Online Test
Q1. At the surface of a charged conductor, electrostatic field must be
Answer : Option A
Explaination / Solution:
Under static conditions, no current exists on the surface of a conductor. If the electric field at its surface is tangential or parallel to the surface, the tangential electric field would cause the charges to move on the surface of the conductor causing currents to flow on its surface. Therefore electrostatic field is always normal to the surface of a charged conductor at every point.
Q2. Defects in solids can be studied using
Answer : Option B
Explaination / Solution:
All these can be used to detect defects in solid
Q3. A budget constraint line is a result of?
Answer : Option B
Explaination / Solution:
No Explaination.
Q4. One of the statements below is not true for the classification of polymers can be classified on the basis of their
Answer : Option D
Explaination / Solution:
Polymer cannot be classified on the basis of their resistance to different agents.
Q5. Elements of which group are known as ore forming elements?
Answer : Option D
Explaination / Solution:
Maximum number of ores contain group16 elements (O, S etc). They are known as "chalcogens" which was derived from the Greek word chalcos , meaning "ore formers," since they all are be found in copper ores.
Q6. denotes to
Answer : Option C
Explaination / Solution:
Pressure potential is usually positive, though in plants negative potential or tension inthe water column in the xylem plays a major role in water transport up a stem. Pressure potential is denoted as .
Q7. The radius of gyration of a body about an axis may be defined as the
Answer : Option D
Explaination / Solution:
It is the perpendicular distance from the axis of rotation to a point mass of mass m that gives an equivalent inertia to the original object (of mass, m)
if radius of gyration is k then
Q8. If a ball is spinning in an airflow it develops pressure difference between the lower and upper faces due differences in the
Answer : Option A
Explaination / Solution:
The Magnus effect is an observable phenomenon that is commonly associated with a spinning object that drags air faster around one side, creating a difference in pressure that moves it in the direction of the lower-pressure side.
The Magnus effect often occurs when a spinning sphere (or cylinder) curves away from its principal flight path.
This phenomenon is important in the study of the physics of many ball sports. It is also an important factor in the study of the effects of spinning on guided missiles—and has some engineering uses, for instance in the design of rotor ships and Flettner aeroplanes.
Q9. Enthalpy of atomization is enthalpy change on breaking
Answer : Option D
Explaination / Solution:
Enthalpy of atomization is enthalpy change that take place on breaking one mole of bonds completely to obtain atoms in the gas phase.
Q10. The formation of erythrocytes in foetus takes place in
Answer : Option B
Explaination / Solution:
In the early fetus, erythropoiesis takes place in the mesodermal cells of the yolk sac. Later, the production of RBCs starts in the fetal liver and increases till the 2nd trimester. After this, the rate of synthesis begins to decline in liver as erythropoiesis increases in the bone marrow. RBCs are still produced in the liver for approximately 1 week after birth.
