Considering Earth's potential as 0 is nothing but an assumption.We assume that Earth is a collection of infinte negative charge and it can even supply more charges to it.As earth has such a huge amount of negative charge with capacity to be supplied with even more any other body will be positive w.r.t Earth.Hence we assume its potential to be zero.

Aliter

As Earth can store unlimited charge its capacitance is infinity

Q=CV

=>C=Q/V

As C is infinity V has to be 0.

Hope this solved your query

Regards

View More

As parallel theorem states that the moment of inertia of a planar body about an axis parallel to an axis passing through the center of mass is equal to the sum of the moment of inertia of body about an axis passing through center of mass and product of mass & square of the distance between two axes.

Flux may be Positive Negative or zero -
For closed body.
- wherein
Total flux coming out from unit charge

In NO3- ions, to know the no. of bond pairs
NO3- =[5+6(3)+1]=24 electrons
→The central atom, Nitrogen has 4 bonded pairs with the 3 oxygen atoms (3σ,1π)
→Nitrogen does not have any lone pairs of electrons.
Correct ans:- Bond pairs and lone pairs of electrons on nitrogen atom are 4 and 0

Energy released from emission of electron
E=10.2eV
From photo electric equation work function,

Quantization of charge -
Charge on any body will be some integral multiple of e.
- wherein
n = 1, 2, 3, ......
To calculate charge, we will apply formula Q = ne for this, we must have number of electrons. Here, number of electrons
i.e
So
Since electrons have been removed, charge will be positive i.e Q = + 0.08 C

Charge of the particle is given by
qE = mg or

As we learned,
Motion of connected blocks over pulley -
Equation of motion for
Equation of Motion for
- wherein
: T - 60g = 60 a
or 960 - (6010) = 60a
or 60a = 360
or a = 6ms-2
Correct option is 2.

As we learned
Vant Hoff factor for dissociation -
number of particles associated
degree of association
e.g. Carboxylic acid dimerized in non polar solvents like Hexane.
- wherein
n = 2 for dimerization
n = 3 for trimerization
Benzoic acid in benzene undergoes association through intermolecular hydrogen bonding. That's why observed molar mass of benzonic acid in benzene is more than...

String fixed at one end and free from other end -
- wherein
is fundamental frequency
For f = 512 Hz - marking 11cm below reference mark
For f = 256 Hz - marking 27cm below the reference mark
So we have
........i
..........ii
from i and ii

- Previous
- Next

Exams

Articles

Questions