Latest Posts

If we choose the upward direction as positive which of the following graphs correctly represents the acceleration of a freely falling body?

A since upward direction is given as positive the downward direction will be negative. All throughout the acceleration remains -9.8m/s2.... View Article

The displacement-time graph shows the following:

An object starting from s = 10 m and having constant positive velocity.

Suppose two systems X and Y are separated by adiabatic wall and both are in contact with another system Z separated by a conducting wall as shown in the figure below. Let the temperatures of the three systems be Tx, Ty and Tz . It is given that Tx= Tz and Ty = Tz then what would be the relation between Tx and Ty?

Tx=Ty according to Zeroth law of thermodynamics.

A motorcycle and a truck are both moving in the same direction in adjacent lanes on a highway. At a particular instant, the speed of motorcycle is four times as large as the speed of truck v. At that instant, motorcycle is accelerating forward while the truck is moving at a constant velocity. Which one of the following statements best describes which vehicle has a larger momentum at that instant?

Momentum is mass times velocity, and the mass is not given. However, the truck would have a larger momentum if... View Article

In which direction should the boy apply the force, in order to stop a trolley sliding downward on the staircase?

The boy has to apply a force in the upward direction, to stop it. If you apply a downward force,... View Article

What is earthing and grounding means?

Earthing is done by providing an earth wire from the device to the ground. if an earth wire is provided, it... View Article

A scientific instrument used to detect the charge on a body is known as:

Electroscope is a scientific instrument that is used for detecting an electric charge and its polarity.

Magnitude of electric charge on a single electron is:

Magnitude of electric charge on a single electron is 1.6 x 10-19 coulomb.

SI unit of electric charge is:

SI unit of electric charge is coulomb.

Which of the following quantity is a scalar?

Electric Flux is scalar quantity whereas rest are vector quantities

What is SI unit of electric flux?

Electric flux is defined as the measure of the distribution of the electric field or the rate of flow of... View Article

Electric Flux: Scalar or a Vector Quantity?

Answer: Electric flux is a scalar quantity. It is a scalar because it is the dot product of two vector... View Article

Charging a metal sphere by contact using a positively charged rod, followed by grounding can result in ________ charge in a metal sphere.

The charge on the rod is shared between the rod and the sphere when they are in contact with each... View Article

In a gold leaf electroscope, the extent of divergence produced in the two leaves indicates the amount of

More the charge on the leaves, the more is the divergence of the gold leaves.

In SI units, a unit of charge is given as?

In SI units, a unit of charge is given as Coulomb. One Coulomb is defined as the quantity of electric... View Article

The flux associated with a spherical surface is 104 Nm2C-1. What will be the flux, if the radius of the spherical shell is doubled?

If the radius of the spherical shell is double then also flux associated with spherical surface remain unchanged because the... View Article

«
1
…
4,916
4,917
4,918
4,919
4,920
…
5,472
»