Physics-
General
Easy
Question
Block A of mass m is placed on a plank B. A light support S is fixed on plank B and is attached with the block A with a spring of spring constant K. Consider that initially spring is in its natural length. If the plank B is given an acceleration a, then maximum compression in the spring is k xma . Find the value of x. (All the surfaces are smooth)
The correct answer is:
Related Questions to study
Physics-
A block B of mass 10 kg is placed on smooth horizontal surface over it another block A of same mass is placed. A horizontal force F is applied on block B
S1 : No block will move unless F > 10 N.
S2 : Block A will move towards left.
S3 : Acceleration of block B will never be less than that of A.
S4 : The relative motion between A and B will start when F exceeds 10 N.
A block B of mass 10 kg is placed on smooth horizontal surface over it another block A of same mass is placed. A horizontal force F is applied on block B
S1 : No block will move unless F > 10 N.
S2 : Block A will move towards left.
S3 : Acceleration of block B will never be less than that of A.
S4 : The relative motion between A and B will start when F exceeds 10 N.
Physics-General
Physics-
O is a point at the bottom of a rough plane inclined at an angle a to the horizontal. Coefficient of friction between AB is 
and between BO is
. B is the mid–point of AO. A block is released from rest at A. Then identify which graphs are correct during motion of block from point A to O taking direction down the incline plane as positive (sina = 1/5) :
O is a point at the bottom of a rough plane inclined at an angle a to the horizontal. Coefficient of friction between AB is and between BO is. B is the mid–point of AO. A block is released from rest at A. Then identify which graphs are correct during motion of block from point A to O taking direction down the incline plane as positive (sina = 1/5) :
Physics-General
Physics-
ABC is a triangle in vertical plane. Its two base angles ÐBAC and ÐBCA are 45º and tan–1 (1/3) respectively. A particle is projected from point A such that it passes through vertices B and C. Find angle of projection in degrees:
ABC is a triangle in vertical plane. Its two base angles ÐBAC and ÐBCA are 45º and tan–1 (1/3) respectively. A particle is projected from point A such that it passes through vertices B and C. Find angle of projection in degrees:
Physics-General
Chemistry-
The space between nucleus and electrons in an atom is
The space between nucleus and electrons in an atom is
Chemistry-General
Chemistry-
Rutherford’s experiment on scattering of alpha particles showed for the first time that atom has:
Rutherford’s experiment on scattering of alpha particles showed for the first time that atom has:
Chemistry-General
Chemistry-
The cations and anions formed as a result of electron transfer are drawn towards each other due to the electrostatic force (coulomb force) of attraction. They form an ionic bond or an electrovalent bond. The bond between two elements is ionic if the EN difference between them is greater than 1.7. The number of electrons transferred during an ionic bond formation is known as an electrovalency. Compounds containing ionic bonds are called ionic compounds. Examples of ionic compounds are NaCl(Na+Cl–), CaO(Ca2+O2–), MgO(Mg2+O2–) and MgCl2 
.
Element X is strongly electropositive and the element Y is strongly electronegative. Both are univalent. The compound formed would be:
The cations and anions formed as a result of electron transfer are drawn towards each other due to the electrostatic force (coulomb force) of attraction. They form an ionic bond or an electrovalent bond. The bond between two elements is ionic if the EN difference between them is greater than 1.7. The number of electrons transferred during an ionic bond formation is known as an electrovalency. Compounds containing ionic bonds are called ionic compounds. Examples of ionic compounds are NaCl(Na+Cl–), CaO(Ca2+O2–), MgO(Mg2+O2–) and MgCl2 .
Element X is strongly electropositive and the element Y is strongly electronegative. Both are univalent. The compound formed would be:
Chemistry-General
Chemistry-
An aqueous solution of a salt Compound A is :
A)gives a white precipitate
B)with sodium chloride solution The filtrate gives a black precipitate
C)when H2S is passed into it Compound (B) dissolves in hot water and the solution gives a yellow precipitate
D)on treatment with sodium iodide The compound (A) does not give any gas with dilute HCl but liberates a reddish brown gas on heating Identify the compounds (A) to (D)
An aqueous solution of a salt Compound A is :
A)gives a white precipitate
B)with sodium chloride solution The filtrate gives a black precipitate
C)when H2S is passed into it Compound (B) dissolves in hot water and the solution gives a yellow precipitate
D)on treatment with sodium iodide The compound (A) does not give any gas with dilute HCl but liberates a reddish brown gas on heating Identify the compounds (A) to (D)
Chemistry-General
Physics-
Two pure inductors each of self inductance L are connected in parallel but are well separated from each other. The total inductance is
Two pure inductors each of self inductance L are connected in parallel but are well separated from each other. The total inductance is
Physics-General
Physics-
In the following circuit, the bulb will become suddenly bright if
In the following circuit, the bulb will become suddenly bright if
Physics-General
Physics-
Two coils of self inductance 
and 
are placed closer to each other so that total flux in one coil is completely linked with other. If 
is mutual inductance between them, then
Two coils of self inductance and are placed closer to each other so that total flux in one coil is completely linked with other. If is mutual inductance between them, then
Physics-General
Physics-
One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant sped v then the emf induced in the circuit in terms of B, l and v where l is the width of each tube, will be
One conducting U tube can slide inside another as shown in figure, maintaining electrical contacts between the tubes. The magnetic field B is perpendicular to the plane of the figure. If each tube moves towards the other at a constant sped v then the emf induced in the circuit in terms of B, l and v where l is the width of each tube, will be
Physics-General
Physics-
A horizontal straight conductor kept in north-south direction falls under gravity, then
A horizontal straight conductor kept in north-south direction falls under gravity, then
Physics-General
Physics-
A conducting square loop of side l and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane at the loop exists everywhere with half the loop outside the field, as shown in figure. The induced e.m.f. is
A conducting square loop of side l and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A magnetic induction B constant in time and space, pointing perpendicular and into the plane at the loop exists everywhere with half the loop outside the field, as shown in figure. The induced e.m.f. is
Physics-General
Physics-
The current carrying wire and the rod AB are in the same plane. The rod moves parallel to the wire with a velocity v. Which one of the following statements is true about induced emf in the rod
The current carrying wire and the rod AB are in the same plane. The rod moves parallel to the wire with a velocity v. Which one of the following statements is true about induced emf in the rod
Physics-General
Physics-
A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be
A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be
Physics-General
