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Physics · 2014 · Shift 0

30 questions from this JEE Main paper

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2014 · Shift 0
Physics

Physics · 2014 · Shift 0

30 questions from this JEE Main paper

Electronic Devices2 questions Electromagnetic Waves2 questions Atoms and Nuclei2 questions Alternating Current1 questions Geometrical Optics2 questions Wave Optics1 questions Magnetics1 questions Magnetic Properties of Matter1 questions Current Electricity1 questions Properties of Matter4 questions Capacitor1 questions Electrostatics1 questions Waves1 questions Simple Harmonic Motion1 questions Heat and Thermodynamics2 questions Rotational Motion2 questions Gravitation1 questions Work Power and Energy1 questions Laws of Motion1 questions Motion in A Straight Line1 questions Units and Measurements1 questions

Q45.The current voltage relation of diode is given by $I = (e^{100 V / T} - 1) m A,$ where the applied voltage $V$ is in volts and the temperature $T$ is in degree kelvin. If a student makes an error measuring $\pm 0.01 V$ …
Physics · Electronic Devices · MCQ
Q46.The forward biased diode connection is:
Physics · Electronic Devices · MCQ
Q47.Match List - $1$ (Electromagnetic wave type ) with List - $2$ (Its association/application) and select the correct option from the choices given below the lists: Includes diagram
Physics · Electromagnetic Waves · MCQ
Q48.The radiation corresponding to $3 \to 2$ transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field $3 \times 1 0^{- 4} T .$ If the radius of the larger circular…
Physics · Atoms and Nuclei · MCQ
Q49.During the propagation of electromagnetic waves in a medium :
Physics · Electromagnetic Waves · MCQ
Q50.Hydrogen $(_{1} H^{1})$ , Deuterium $(_{1} H^{2})$ , singly ionised Helium $(_{2} H e^{4})^{+}$ and doubly ionised lithium $(_{3} L i^{6})^{++}$ all have one electron…
Physics · Atoms and Nuclei · MCQ
Q51.In the circuit shown here, the point $^{'} C^{'}$ is kept connected to point $^{'} A^{'}$ till the current flowing through the circuit becomes constant. Afterward, suddenly, point $^{'} C^{'}$ is disconnected from point $^{'} A^{'}$ and connected to point $^{'} B^{'}$ at… Includes diagram
Physics · Alternating Current · MCQ
Q52.A green light is incident from the water to the air - water interface at the critical angle $(θ)$ . Select the correct statement.
Physics · Geometrical Optics · MCQ
Q53.A thin convex lens made from crown glass $(μ = \frac{3}{2})$ has focal length $f$ . When it is measured in two different liquids having refractive indices $\frac{4}{3}$ and $\frac{5}{3},$ it has the focal lengths $f_{1}$ …
Physics · Geometrical Optics · MCQ
Q54.Two beams, $A$ and $B$ , of plane polarized light with mutually perpendicular planes of polarization are seen through a polaroid. From the position when the beam $A$ has maximum intensity (and beam $B$ has zero intensity), a rotation of…
Physics · Wave Optics · MCQ
Q55.A conductor lies along the $z$ -axis at $- 1.5 \leq z < 1.5 m$ and carries a fixed current of $10.0 A$ in $- a_{z}$ direction (see figure). For a field $B = 3.0 \times 1 0^{- 4} e^{- 0.2 x} a_{y} T,$ … Includes diagram
Physics · Magnetics · MCQ
Q56.The coercivity of a small magnet where the ferromagnet gets demagnetized is $3 \times 1 0^{3} A m^{- 1} .$ The current required to be passed in a solenoid of length $10 c m$ and number of turns $100,$ so that the magnet gets demagnetized…
Physics · Magnetic Properties of Matter · MCQ
Q57.In a large building, three are $15$ bulbs of $40 W$ , $5$ bulbs of $100 W$ , $5$ fans of $80 W$ and $1$ heater of $1 k W .$ The voltage of electric mains is $220 V .$ The minimum capacity of the main fuse of the building will be:
Physics · Current Electricity · MCQ
Q58.An open glass tube is immersed in mercury in such a way that a length of $8 c m$ extends above the mercury level. The open end of the tube is then closed and scaled and the tube is raised vertically up by additional $46 c m$ . What will be…
Physics · Properties of Matter · MCQ
Q59.A parallel plate capacitor is made of two circular plates separated by a distance $5 mm$ and with a dielectric of dielectric constant $2.2$ between them. When the electric field in the dielectric is $3 \times 1 0^{4} V / m$ the charge density…
Physics · Capacitor · MCQ
Q60.Assume that an electric field $E = 30 x^{2} i$ exists in space. Then the potential difference $V_{A} - V_{O},$ where $V_{O}$ is the potential at the origin and $V_{A}$ the potential at $x = 2 m$ is :
Physics · Electrostatics · MCQ
Q61.A pipe of length $85 c m$ is closed from one end. Find the number of possible natural oscillations of air column in the pipe whose frequencies lie below $1250 H z$ . The velocity of sound in air is $340 m / s$ .
Physics · Waves · MCQ
Q62.A particle moves with simple harmonic motion in a straight line. In first $τ s,$ after starting from rest it travels a distance $a,$ and in next $τ s$ it travels $2 a,$ in same direction, then:
Physics · Simple Harmonic Motion · MCQ
Q63.One mole of a diatomic ideal gas undergoes a cyclic process $A B C$ as shown in figure. The process $B C$ is adiabatic. The temperatures at $C$ and $C$ are $400 K$ , $800 K$ and $600 K$ respectively. Choose the correct statement : Includes diagram
Physics · Heat and Thermodynamics · MCQ
Q64.There is a circular tube in a vertical plane. Two liquids which do not mix and of densities $d_{1}$ and $d_{2}$ are filled in the tube. Each liquid subtends $9 0^{\circ}$ angle at center. Radius joining their interface makes an angle $α$ … Includes diagram
Physics · Properties of Matter · MCQ
Q65.On heating water, bubbles being formed at the bottom of the vessel detach and rise. Take the bubbles to be spheres of radius $R$ and making a circular contact of radius $r$ with the bottom $R$ and making a circular contact of radius $r$ … Includes diagram
Physics · Properties of Matter · MCQ
Q66.Three rods of Copper, Brass and Steel are welded together to form a $Y$ shaped structure. Area of cross - section of each rod $= 4 c m^{2} .$ End of copper rod is maintained at $10 0^{\circ} C$ where as ends of brass and steel are kept at $0^{\circ} C$ …
Physics · Heat and Thermodynamics · MCQ
Q67.The pressure that has to be applied to the ends of a steel wire of length $10 c m$ to keep its length constant when its temperature is raised by $10 0^{\circ} C$ is: (For steel Young's modulus is $2 \times 1 0^{11} N m^{- 2}$ and…
Physics · Properties of Matter · MCQ
Q68.A mass $^{'} m^{'}$ is supported by a massless string wound around a uniform hollow cylinder of mass $m$ and radius $R .$ If the string does not slip on the cylinder, with what acceleration will the mass fall or release? Includes diagram
Physics · Rotational Motion · MCQ
Q69.Four particles, each of mass $M$ and equidistant from each other, move along a circle of radius $R$ under the action of their mutual gravitational attraction. The speed of each particle is :
Physics · Gravitation · MCQ
Q70.A bob of mass $m$ attached to an inextensible string of length $l$ is suspended from a vertical support. The bob rotates in a horizontal circle with an angular speed $ω r a d / s$ about the vertical. About the point of suspension:
Physics · Rotational Motion · MCQ
Q71.When a rubber-band is stretched by a distance $x$ , it exerts restoring force of magnitude $F = a x + b x^{2}$ where $a$ and $b$ are constants. The work done in stretching the unstretched rubber-band by $L$ is :
Physics · Work Power and Energy · MCQ
Q72.A block of mass $m$ is placed on a surface with a vertical cross section given by $y = \frac{x ^{3}}{6} .$ If the coefficient of friction is $0.5,$ the maximum height above the ground at which the block can be placed without slipping is:
Physics · Laws of Motion · MCQ
Q73.From a tower of height H, a particle is thrown vertically upwards with a speed u. The time taken by the particle, to hit the ground, is n times that taken by it to reach the highest point of its path. The relation between H, u and n is:
Physics · Motion in A Straight Line · MCQ
Q74.A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?
Physics · Units and Measurements · MCQ