# Q&A - Ask Doubts and Get Answers

Sort by :
Q
Engineering
64 Views   |   2 weeks, 3 days ago

which interval probability lies.

View All Answers (1)

H Himanshu Meshram
Answered 2 weeks, 3 days ago
@_Rakesh, Minimum value of probability of an event is  0 and maximum ia 1. Probabilty of an event or intervel lies in [0,1]
Engineering
59 Views   |   2 weeks, 3 days ago
find the general trem in the expansion of $(x^{2} - yx)^{12}$

View All Answers (1)

H Himanshu Meshram
Answered 2 weeks, 3 days ago
Engineering
57 Views   |   2 weeks, 3 days ago
Let  $f(x)=2^{10}x+1$ and $g(x)=3^{10}x+1$. If $(fog)(x)=x$ , then x is equal to :

View All Answers (1)

S Satyajeet kumar
Answered 2 weeks, 3 days ago
Engineering
79 Views   |   2 weeks, 3 days ago
sir,what is releation between  emf and p.d ,from chapter current electricity, plz explain me those releation

View All Answers (3)

A Avinash Dongre
Answered 2 weeks, 3 days ago

@Nilesh

The potential difference accross the terminals of a cell when it is not supplying any current is called e.m.f while

The voltage accross the terminals of a cell when it is supplying current to external resistance is known as Potential Difference .

When the cell is being charged

$E=V-iR$

$(E

View More
Engineering
74 Views   |   2 weeks, 3 days ago
Sir, I have a doubt about the question given in concept of charge conservation. Can't mass also be conserved?

View All Answers (1)

A Avinash Dongre
Answered 2 weeks, 3 days ago
@Shashank The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system's mass cannot change, so quantity cannot be added nor removed. Hence, the quantity of mass is conserved over time.
Engineering
70 Views   |   2 weeks, 3 days ago
I want to calculate resultant resistance  then how can calculate?

View All Answers (2)

A Avinash Dongre
Answered 2 weeks, 3 days ago

@Nilesh

Strategy for simplifying a resistor network

• Begin as far away as possible from the circuit location in question.
• Replace series or parallel resistors with their equivalent resistor.
• Continue, moving left until a single equivalent resistor represents the entire resistor network.
Engineering
68 Views   |   2 weeks, 3 days ago
plz help me to solve questions about effective resistance in both series  plz help me

View All Answers (2)

A Avinash Dongre
Answered 2 weeks, 3 days ago

@Nilesh  When resistors are connected in series, the current through each resistor is the same and

the total potential difference across all the resistors is equal to the sum of the potential differences across each resistor.

For example when resistor $R_{1} , R_{2} ,R_{3}$ are connected in sereis then

$R_{eq} = R_{1} + R_{2} + R_{3}$

1, 2,
View More
Engineering
79 Views   |   2 weeks, 3 days ago
The radius and mass of earth are increased by 0.5%. Which of the following statements are true at the surface of the earth? A) g will increase B)             g will decrease C)             Escape velocity will remain unchanged D)             Potential energy will remain unchanged

View All Answers (2)

V Vishwash Tetarwal
Answered 2 weeks ago

$g = \frac{GM}{{R}^{2}}$

${v}_{e} = \sqrt{\frac{2GM}{R}}$

$U=\frac{-GMm}{R}$

$g\propto \frac{M}{{{R}^{2}}}$

${{v}_{e}}\propto \sqrt{\frac{M}{R}}$

$U\propto \frac{M}{R}$

after increasing by 0.5%

$M_{new} = M+(0.5/100)M=1.005M$

$R_{new} = R+(0.5/100)R=1.005R$

So If both mass and radius are increased by 0.5% then $v_{e}$ and U remains unchanged where as g will be decreased.

View More
Engineering
76 Views   |   2 weeks, 4 days ago
Hello   When a body is earth connected then the electrons from the earth flow into the body...that means the body is uncharged right?? When the body is earth connected , how can the body be positively charged? Like I meant the electrons doesn't flow as it remains unchanged Hello anybody there   Plzz reply

View All Answers (3)

V Vishwash Tetarwal
Answered 2 weeks ago

the body is positively charged before grounding and after that electrons flows from earth to body and body becomes neutral.

the Body is positively charged before grounding because If a body is grounded and electrons starts flowing into the body from then Earth this would mean that the charges inside the body are attracting the negative electrons from Earth as a potential difference is being developed at the two ends, the Earth and the body.

View More
Engineering
1 Views   |   2 weeks, 4 days ago
Hello   When a body is earth connected then the electrons from the earth flow into the body...that means the body is uncharged right?? When the body is earth connected , how can the body be positively charged? Like I meant the electrons doesn't flow as it remains unchanged Hello anybody there   Plzz reply
Engineering
2 weeks, 4 days ago

A.

360

B.

240

C.

120

D.

480

Engineering
56 Views   |   2 weeks, 5 days ago

View All Answers (1)

A Amit Kumar
Answered 2 weeks ago
An asymmetric carbon atom (chiral carbon) is a carbon atom that is attached to four different types of atoms or groups of atoms.For example It's mirror image can't be impose
Engineering
22 Views   |   2 weeks, 5 days ago

answer for this qns with soln

View All Answers (1)

V Vishwash Tetarwal
Answered 2 weeks ago
=plank's constant  =speed of light   = wavelength E = 14.4KeV = 14400eV so As we can see   means that it belongs to Gamma Rays
Engineering
2 Views   |   2 weeks, 5 days ago
Engineering
15 Views   |   2 weeks, 6 days ago

View All Answers (1)

V Vishwash Tetarwal
Answered 2 weeks ago
G = Gravitational constant  = mass of earth r = radius of earth At height h, acceleration due to gravity is if
Engineering
2 Views   |   3 weeks, 2 days ago

In the mapping ; Co - domain of this function

Your Option is correct !!

A.

B.

C.

D.

« Previo

Engineering
2 Views   |   3 weeks, 2 days ago
Engineering
8 Views   |   3 weeks, 2 days ago

An electromagnetic wave of frequency 1x1014 hertz is propagating along z - axis. The amplitude of electric field is 4 V/m.          If  = 8.8 x 10-12 C2/N-m2, then average energy density of electric field will be :

A.

35.2 x 10-10 J/m3

B.

35.2 x 10-11 J/m3

C.

35.2 x 10-12 J/m3

D.

35.2 x 10-13 J/m3

View All Answers (1)

V Vishwash Tetarwal
Answered 1 week, 6 days ago
Average Energy density of Electromagnetic wave is given by
Exams
Articles
Questions