Engineering Q&A - Ask Questions and Get Answers

2 weeks ago

MHT-CET A flywheel at rest is to reach an angular velocity of 24 rev/s in 8 seconds with constant angular acceleration.

The total angle turned through during this interval is

48 rad
24 rad
96 rad
72 rad

A Abhishek Sahu
Answered 1 week, 6 days ago

Given initial angular velocity, final angular velocity, = 24 rad/s t = 8 seconds angular acceleration, option (3) is correct

Engineering

2 weeks ago

MHT-CET When the same monochromatic ray of light travels through water, the number of waves in glass slab of thickness 6 cm is same as in

water column of height 7 cm. If refractive index of water is

1.269
1.286
1.259
1.310

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A Abhishek Sahu
Answered 1 week, 6 days ago

It is given that wave number in 6cm of glass is the same as the wave number in water with height 7 cm. Let is wavelength of light in glass and is wavelength of light in water. According to question, Also we know that relation between refractive index and wavelength, Putting values, Option (2) is correct

Engineering

2 weeks ago

MHT-CET In series LCR circuit R = 18 ohm and impedance is 33 ohm. An r.m.s Voltage 220 V is applied across the circuit.

The true power consumed in a.c. circuit is

400 W
600 W
220 W
800 W

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A Abhishek Sahu
Answered 1 week, 6 days ago

Given, R = 18 ohm Z = 33 ohm Vrms = 220 V For calculating Power, option (4) is correct

Engineering

2 weeks ago

MHT-CET Photodiode is a device(1)Which is always operated in reverse bias(2)Which is always operated in forward bias

3. In which photo current is independent of intensity of incident radiation

4. Which may be operated in forward or reverse bias

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A Abhishek Sahu
Answered 1 week, 6 days ago

Option (1) is correct Photo Diode is operated only in reverse bias

Engineering

2 weeks, 3 days ago

In which of the following pairs of molecules/ ions, the central atoms have sp2 hybridisation?

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A Ankit Dutt
Answered 2 weeks, 2 days ago

As options are not given in the questions, so I am solving this question considering these below options. You can relate to your approach in the same way. Options: Thus, among the given pairs, only have hybridisation.

Engineering

2 weeks, 3 days ago

The pairs of species of oxygen and their magnetic behaviour are noted below. Whichof the follow ing presents the correct description?

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A Ankit Dutt
Answered 2 weeks, 1 day ago

As we learnt in Magnetic behaviour of molecule - If all the molecular orbitals in a molecule are doubly occupied, the substance is diamagnetic - wherein However if one or more molecular orbital are singly occupied it is paramagnetic e.g. O2 Electronic configuration of molecule Since there are 2 unpaired electrons in & degenerate orbitals, so, is paramagnetic. Similarly, for molecule,...

Engineering

2 weeks, 4 days ago

Which of the following has the minimum bond length?

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A Ankit Dutt
Answered 2 weeks, 1 day ago

As we learnt in Bond Order - Bond order is defined as one half the difference between the number of electrons present in the bonding and the antibonding orbitals. - wherein We know that bond order of all the species given, has the highest bond order at 2.5 thereby giving it the lowest bond length. Option 1) This is the correct option Option 2) This is an incorrect option Option 3) This...

Engineering

2 weeks, 4 days ago

N_{2} + 3H_{2}\rightarrow2NH_{3} After completion of 75% of the reaction what would be the mole fraction for the constituents

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R Rakhi
Answered 2 weeks ago

As we learnt in Mole Fraction - It is the ratio of moles of solute or moles of solvent to moles of the solution. - wherein If a substance ‘A’ dissolves in substance ‘B’ and their number of moles are and respectively; then the mole fractions of A and B are given as Mole fraction of A = (number of moles of A)/(number of moles of solution ) = /(+ ) At , ...

Engineering

2 weeks, 4 days ago

Dark fog having condenced water vapour , dust ,smoke and gases (SO2 ,H2S ,NO2 ) etc. is called

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R Rakhi
Answered 2 weeks, 1 day ago

classical smog. The smog is formed by condensation of water vapour with H2S and SO2 over dust and smoke particles. It is dark brown and opaque.

Engineering

2 weeks, 5 days ago

An object having mass = 2kg experience a force F= 2t^{2}\widehat{i} in x - direction. Find work done by force in first 3 sec.

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A Abhishek Sahu
Answered 2 weeks, 2 days ago

Given, m = 2 kg F = 2t^2 i a = F/m = 2t^2/2 = t^2 i Assuming initial velocity was zero, u = 0 We know that, dw = F.dx Put t = 3 secs W = 81 J

Engineering

2 weeks, 5 days ago

In the given circuit diagram, the currents, I1 = -0.3 A, I4 = 0.8 A and I5 = 0.4 A, areflowing as shown. The currents I2 , I3 and I6 ,respectively, are :

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A Abhishek Sahu
Answered 2 weeks, 2 days ago

Kirchoff's first law - - wherein Apply Kcl at Q I6+I3 = I1+ I2 .........(1) I1 = 0.3A I4 = 0.8A I5 = 0.4A KCL at 5 I4= I5 +I3 I3 = I4 - I5 = 0.8 +0.4 =0.4A KCL at R I1+I2 = I4 I2 = I4 - I1 = 0.8 - (-0.3) =1.1A From equation (1) I6 + I3 = I1+ I2 I6 = I1 + I2 - I3 = -0.3+1.1 -0.4 =0.4A I2 = 1.1A I3 = 0.4A I6 = 0.4A

Engineering

2 weeks, 5 days ago

Can anyone tell me the structure of nacl and finding formula is quite different in that not like as acc n bcz . I could not find

Engineering

2 weeks, 5 days ago

What is the density of N2 gas at 227°C and 5.00 atm. pressure? (R = ,0.082 L atm K-1 mol--1) (a) 1.40 g/ml (b) 2.81 g/ml (c)3.41 g/m (d)0.29

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A Abhishek Sahu
Answered 2 weeks, 2 days ago

Ideal gas equation, PV = nRT n = w/M where w is weight of gas and M is molar mass PV = w/M (RT) => PM = w/V (RT) (density, d =w/V) => PM = dRT d = PM/RT d = 5x28/0.082x500 = 3.41 g/ml

Engineering

2 weeks, 5 days ago

If |z^{2} -1| = |z|^{2}+1, then z lies on?

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A Abhishek Sahu
Answered 2 weeks, 2 days ago

Let Z = x +iy Hence z will lie on imaginary axis for every x

Engineering

2 weeks, 5 days ago

U(atomic no.92,atomic mast 238) emits 8 alpha and 6 beeta particles.the neutron/proton ratio in the product nucleus is? Explain solution...

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A Abhishek Sahu
Answered 2 weeks, 2 days ago

Alpha emission : Beta Emission : In this problem, both alpha and beta emissions are taking place. Putting value of A and Z Now in the product nucleus, Number of protons = 82 and number of neutrons = 206-82 = 124 Ratio of Neutron/Proton = 124/82 = 62/41

Engineering

2 weeks, 5 days ago

A concave mirror produces a real image n times the object. Find u in terms of f and n.

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A Abhishek Sahu
Answered 2 weeks, 2 days ago

Given, V =nU Mirror formula, In concave mirror

Engineering

2 weeks, 5 days ago

is potential energy mgh, negative when a particle is displaced against gravity?

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A Abhishek Sahu
Answered 2 weeks, 2 days ago

No potential energy is not negative when you displace particle against gravitation. Take help of vectors for understanding this, Now if you are displacing particle against gravity that means you are taking particle in upward direction while the direction of g is in downward. So the dot product will give positive value equal to mgh.

Engineering

2 weeks, 6 days ago

∆fG at 500 K for substance ‘S’ in liquidstate and gaseous state are+100.7 kcal mol−1 and +103 kcal mol−1,respectively.

Vapour pressure of liquid ‘S’ at 500 K is approximately equal to

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A Abhishek Sahu
Answered 2 weeks, 2 days ago

As we have learnt, Δ G of equilibrium - - wherein At Equilibrum and

Engineering

3 weeks ago

BITSAT In the following question the rule is that ‘closed figures become more and more open and open figures become more and more closed.