Mansi Behl asked • 12 minutes ago

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-

Assertion (A): The vector equation of the plane passing through the points (1, -2, 5), (0, -5, -1), (-3, 5, 0) is

Reason (R): The vector equation of the plane passing through the points

Assertion (A): The vector equation of the plane passing through the points (1, -2, 5), (0, -5, -1), (-3, 5, 0) is

Reason (R): The vector equation of the plane passing through the points

- a)Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
- b)Both Assertion and Reason are true and Reason is not the correct explanation of Assertion.
- c)Assertion is true but Reason is false.
- d)Assertion is false but Reason is true.

Correct answer is option 'A'. Can you explain this answer?

Himanshu Dubey asked • 22 minutes ago

A copper rod of length l rotates about its end with angular velocity ω in uniform magnetic field B. The emf developed between the ends of the rod if the field is normal to the plane of rotation is

- a)Bωl
^{2} - b)1/2 Bωl
^{2} - c)2 Bωl
^{2} - d)1/4 Bωl
^{2}

Correct answer is option 'D'. Can you explain this answer?

Pradeep Singh asked • 56 minutes ago

Swati Sinha Sinha asked • 1 hour ago

When water is filled carefully in a glass, one can fill it to a height h above the rim of the glass due to the surface tension of water. To calculate h just before water starts flowing, model the shape of the water above the rim as a disc of thickness h having semicircular edges, as shown schematically in the figure. When the pressure of water at the bottom of this disc exceeds what can be withstood due to the surface tension, the water surface breaks near the rim and water starts flowing from there. If the density of water, its surface tension and the acceleration due to gravity are 10^{3}kg m^{−3}, 0.07 Nm^{−1} and 10 ms^{−2}, respectively, the value of h (in mm) is _________.-

Correct answer is '3.74'. Can you explain this answer?

Mansi Behl asked • 1 hour ago

Which of the following statements regarding sulfur compounds is false?

- a)A thiol is generally more acidic than an alcohol.
- b)A thiol is generally more nucleophilic than an alcohol.
- c)A thiolate can act as an oxidizing agent.
- d)A dialkyl sulfide can act as a nucleophile.

Correct answer is option 'C'. Can you explain this answer?

Shubh Agarwal asked • 1 hour ago

The longest side of a triangle is three times the shortest side and the third side is 2cm shorter than the longest side if the perimeter of the triangles at least 61cm, find the minimum length of the shortest side.

- a)16 cm
- b)11 cm
- c)61 cm
- d)9 cm

Correct answer is option 'D'. Can you explain this answer?

Swati Sinha Sinha asked • 2 hours ago

For a polynomial g(x) with real coefficient, let mg denote the number of distinct real roots of g(x). Suppose S is the set of polynomials with real coefficient defined by

S = {(x^{2} – 1)^{2} (a_{0} + a_{1}x + a_{2}x^{2} + a_{3}x^{3}) : a_{0}, a_{1}, a_{2}, a_{3} ∈ R}.

For a polynomial f, let f ' and f" denote its first and second order derivatives, respectively. Then the minimum possible value of (m_{f'} + m_{f"}), where f ∈ S, is _______

S = {(x

For a polynomial f, let f ' and f" denote its first and second order derivatives, respectively. Then the minimum possible value of (m

Correct answer is '5.00'. Can you explain this answer?

Mansi Behl asked • 2 hours ago

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-

Assertion(A): The points , (1,3) and (82,30) are collinear.

Reason(R): Three points P_{1},P_{2},P_{3} are collinear , if ∆ = 0 or x_{1} (y_{2}-y_{3}) + x_{2} (y_{3}-y_{1}) + x_{3} (y_{1}-y_{2}) = 0 or = 0

Assertion(A): The points , (1,3) and (82,30) are collinear.

Reason(R): Three points P

- a)Both Assertion and Reason are true and Reason is the correct explanation of assertion.
- b)Both Assertion and Reason are true and Reason is not the correct explanation of assertion.
- c)Assertion is true but Reason is false.
- d)Assertion is false but Reason is true.

Correct answer is option 'A'. Can you explain this answer?

Ram Mohith asked • 2 hours ago

Three semi-conductors are arranged in the increasing order of their energy gap as follows. The correct arrangement is

- a)Tellurium, germanium, silicon
- b)Tellurium, silicon, germanium
- c)Silicon, germanium, tellurium
- d)Silicon, tellurium, germanium

Correct answer is option 'A'. Can you explain this answer?

Mansi Behl asked • 2 hours ago

The equation of the ellipse whose focus is (1,-1), directrix is the line x - y - 3 = 0 and eccentricity is 1/2 is

- a)7x
^{2}+2xy+7y^{2}-10x+10y+7 = 0 - b)7x
^{2}+2xy+7y^{2}+7 = 0 - c)7x
^{2}+2xy+7y^{2}+10x-10y-7 = 0 - d)none of these

Correct answer is option 'A'. Can you explain this answer?

Mansi Behl asked • 2 hours ago

The electrolytes usually used in the electroplating of gold and silver, respectively, are :

- a)[Au(OH)
_{4}]^{–}and [Ag(OH)_{2}]^{–} - b)[Au(CN)
_{2}]^{–}and [Ag CI_{2}]^{–} - c)[Au(NH
_{3})_{2}]^{+}and [Ag(CN)_{2}]^{–} - d)[Au(CN)
_{2}]^{–}and [Ag(CN)_{2}]^{–}

Correct answer is option 'D'. Can you explain this answer?

Chaitanya Barewar asked • 2 hours ago

A particle is moving Eastwards with a velocity of 5m/s. In 10s , the velocity changes to 5 m/s Northwards. The average acceleration in this time is

- a)(1/√2) m/s² towards North-East
- b)(1/√2) m/s² towards North-West
- c)(1/2 )m/s² towards North
- d)zero

Correct answer is option 'B'. Can you explain this answer?

Mansi Behl asked • 3 hours ago

The intensity of a harmonic wave

- a)Depends upon its frequency and not on its amplitude
- b)Depends upon its amplitude and not on its frequency
- c)Depends upon both, its frequency and amplitude
- d)Depends neither on frequency nor on its amplitude

Correct answer is option 'C'. Can you explain this answer?

Anjali Singh Sharma asked • 3 hours ago

Prajwal Yaligar asked • 3 hours ago

A beam of electromagnetic radiation of intensity 6.4 × 10^(–5) W/cm2 is comprised of wavelength,lambda= 310 nm. It falls normally on a metal (work function = 2eV) of surface area of 1 cm2. If one in10^3 photons ejects an electron, total number of electrons ejected in 1 s is 10^x . (hc = 1240 eVnm,1eV =

Correct answer is '11'. Can you explain this answer?

Robin J Vincent asked • 3 hours ago

Which of the following is an example of internal respiration?

- a)H
^{+}+ HCO_{3}= H_{2}CO_{3}= H_{2}O + CO2 - b)C
_{6}H_{12}O_{6}+ 6O_{2}= 6H_{2}O +6CO_{2}+ 38 ATP - c)Diffusion of oxygen from the alveoli to the pulmonary vein
- d)Diffusion of carbon dioxide from the nephron to the renal capillary

Correct answer is option 'D'. Can you explain this answer?

Kritika Bansal asked • 3 hours ago

`O' is the origin & also the centre of two concentric circles having radii of the inner & the outer circle as `a' & `b' respectively. A line OPQ is drawn to cut the inner circle in P & the outer circle in Q. PR is drawn parallel to the y-axis & QR is drawn parallel to the x-axis. Prove that the locus of R is an ellipse touching the two circles. If the focii of this ellipse lie on the inner circle, find the ratio of inner : outer radii & find also the eccentricity of the ellipse.

Correct answer is ','. Can you explain this answer?

Mansi Behl asked • 4 hours ago

To know the resistance G of a galvanometer by half deflection method, a battery of emf V_{E} and resistance R is used to deflect the galvanometer by angle θ. If a shunt of resistance S is needed to get half deflection then G, R and S are related by the equation :

- a)2S (R+G)=RG
- b)S (R+G)=RG
- c)2S=G
- d)2G=S

Correct answer is option 'B'. Can you explain this answer?

Annant Sharma asked • 4 hours ago

In a telephone system four different letter P, R, S, T and the four digits 3, 5, 7, 8 are used.Find the maximum number of “telephone numbers” the system can have if each consistsof a letter followed by a four-digit number in which the digit may be repeated.

Correct answer is '1024'. Can you explain this answer?

Nk Editzz asked • 4 hours ago

An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy E0 Its potential energy is [IIT 1997 Cancelled; MH CET 2002; MP PMT 2000]

- a)−E
_{o} - b)1.5E
_{0} - c)2E
_{0} - d)E
_{0}

Correct answer is option 'C'. Can you explain this answer?

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