In a feedback amplifier, if the feedback voltage is in opposite phase, the gain is less than 1. Then it will:

In the observations of the experiment of scattering of Alpha-particle, Rutherford concluded about the atom that:
(A) the positive charge and the mass of the atom are concentrated at the center called the nucleus
(B) there is positive charge centralized at one point of the size about \( 10^{-10} \text{ m} \) inside the atom
(C) the atom being electrically neutral, it must have negatively charged electrons moving around the nucleus in different orbits
(D) the nucleus is small, electrons move around, there is no space left empty inside the atom
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Which of the following statements are correct?
(A) Total internal reflection occurs when a ray of light travels from a rarer transparent medium to a denser medium.
(B) In total internal reflection, the incident ray of light remains in the same medium after reflection.
(C) In total internal reflection, the angle of incidence inside the denser transparent medium is equal to the angle of reflection in the same medium.
(D) In total internal reflection inside a denser medium there is no angle of refraction
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An electron of mass \( 9.11 \times 10^{-31} \text{ kg} \) is moving with velocity \( 5.4 \times 10^6 \text{ m/s} \). Its momentum will be

A bar magnet, of certain magnetic moment is cut into two equal parts perpendicular to its length (as shown in figure.) The pole strength of each magnetic piece will be :

In an AC circuit, the current leads the voltage by \(\pi/2\). The circuit is :

A resistor of resistance \( 30 \, \Omega \) and a capacitor of capacitance \( (250 \pi^{-1}) \, \mu\text{F} \) are connected in series to a 220 V, 50 Hz source. The current in the circuit is

Which one of the following plays an important role in guiding the entry of pollen tube into the synergid?

Answer the question on the basis of passage given below :
One of the notable features of the transition element is the great variety of oxidation states it may show in its compounds. The elements which give the greatest number of oxidation states occur in or near the middle of the series. Manganese, for example exhibits all the oxidation states from +2 to +7. The lesser number of oxidation states at the extreme ends is either due to losing or sharing of few electrons (Sc, Ti) or too many d electrons of higher valence. Early in the first series scandium (II) is virtually unknown and titanium (IV) which is more stable than Ti (III) or Ti (II). On the other end, the only oxidation state of zinc is \(+ 2\).
Oxidation state of scandium is

Which of the following is incorrect with reference to drug abuse?

Consider the following L.P.P minimize \(z=x-7 y+190\) subject to \(x+y \leq 8, x+y \geq 4, x \leq 5, y \leq 5\) and \(x, y \geq 0\). Then which of the following is/are true?
(A) It's feasible region is unbounded
(B) It's feasible region is bounded
(C) It's feasible region has 5 corner polnts
(D) It's feasible region has 6 corner polnts
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The process used for the conversion of sugar into Ethanol is :

Match List-I (biomolecule) with List-II (characteristics)

List-I (biomolecul)	List-II (characteristic)
(A) Lactose	(I) Menstrual cycle
(B) Glycine	(II) Bleeding gums
(C) Ascorbic acid	(III) Optically inactive
(D) Estradiol	(IV) Reducing sugar

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