If both the mass and the radius decrease by 1% then the decrease in g
If both the mass and the radius decrease by 1% then the decrease in g will be nearly (a) 1%... View Article
Latest Posts
Find the percentage change in acceleration due to gravity at a height 32 km from surface of earth.
Find the percentage change in acceleration due to gravity at a height of 32 km from the surface of the... View Article
A radioactive sample has initial activity of 28 dpm 30 minutes later its activity 14 dpm. How many atoms of nuclide were present initially?
A radioactive sample has an initial activity of 28 DPM 30 minutes later its activity of 14 DPM. How many... View Article
In an analogue voltmeter, the voltmeter reading is 5.13 ±0.05. What is the least count of this meter?
While doing ohm’s law experiment a student observed that the pointer of the voltmeter coincides with the 15th division. If... View Article
Assertion: If current is flowing through a machine iron eddy currents are produced. Reason: The change in magnetic flux through an area causes eddy current
Assertion: If the current is flowing through a machine iron eddy currents are produced. Reason: The change in magnetic flux... View Article
The position of a particle moving in a straight line (x-axis) is given by x = 4t^2 – 3t^5. The speed of the particle at t = 2 seconds is (x is in metre)
The position of a particle moving in a straight line (x-axis) is given by x = 4t2 – 3t5. The... View Article
A particle is thrown with a velocity of 20 m/s vertically upwards. The distance travelled by the particle in the first second of its descent is
A particle is thrown with a velocity of 20 m/s vertically upwards. The distance travelled by the particle in the... View Article
The unit of electric current “ampere” is the amount of current that is flowing through each of two parallel long wires 1 m apart will give rise to a force per unit length between them equal to
The unit of electric current “ampere” is the amount of current that is flowing through each of two parallel long... View Article
The time period of oscillation of light springs system shown in the figure will be (mass of the block is 2 kg and spring constant of each spring is 600 n/m)
The time period of oscillation of light springs system shown in the figure will be (mass of the block is... View Article
A person wants to resolve two thin poles standing near each other from the distance of 2 km the minimum separation between poles should be nearly thetar 1 arc min
A person wants to resolve two thin poles standing near each other from a distance of 2 km. The distance... View Article
If a cycle wheel of radius 0.5 m completes one revolution in 1 s, then acceleration of a point on the circumference of the wheel will be
If a cycle wheel of radius 0.5 m completes one revolution in 1 s, then the acceleration of a point... View Article
A particle is thrown with initial speed of 10 ms^–1 at an angle of 30° with the horizontal, under gravity at t = 0 s. At = 0.5 s, the speed of particle is
A particle is thrown with an initial speed of 10 ms^–1 at an angle of 30° with the horizontal, under... View Article
A short bar magnet has a magnetic moment of 0. 65 JT^-1, then the magnitude and direction of the magnetic field produced by the magnet at a distance 8 cm from the centre of magnet on the axis is
A short bar magnet has a magnetic moment of 0. 65 JT^-1, then the magnitude and direction of the magnetic... View Article
The co-ordinates of a moving particle are x = at^2 and y = bt^2, where a and b are constants. the velocity of a particle at any instant is
The coordinates of a moving particle are x = at^2 and y = bt^2, where a and b are constants.... View Article
What is the r.m.s values for the current for which the graph here shows its variation with time?
What are the r.m.s values for the current for which the graph here shows its variation with time? (a) \(\begin{array}{l}\frac{i_{0}}{\sqrt{2}}\end{array}... View Article
A series LCR circuit is connected across a source of emf e = 10 sin, the current from the supply is i = 2 sin. Find the phase difference between e and i.
Determine the phase difference between current and voltage in the given series LCR circuit. Answer: The phase difference between current... View Article
Which of the following is the correct stability order for N2 and its given ions?
(A) \(\begin{array}{l} N_{2} > N_{2}^{+} = N_{2}^{-} > N_{2}^{2-} \end{array} \) (B) \(\begin{array}{l} N_{2}^{+} > N_{2}^{-} > N_{2} > N_{2}^{2-}... View Article
The hybridization of atomic orbitals of nitrogen in NO2+, NO3- and NH4+ are:
(A) sp, sp2 and sp3 respectively (B) sp2, sp3 and sp respectively (C) sp3, sp2 and sp respectively (D) sp3, sp... View Article
For a reaction, A + 2B ⟶ C, the amount of C formed by starting the reaction with 5 moles of A and 8 moles of B is:
(A) 4 mol (B) 5 mol (C) 8 mol (D) 16 mol The Correct Answer is (A) 4 mol Solution:... View Article
In which of the following pair is most efficient packing is present?
(A) hcp and ccp (B) hcp and bcc (C) bcc and ccp (D) bcc and simple cubic cell The Correct... View Article
