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Physics · 2006 · Shift 0

49 questions from this JEE Main paper

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2006 · Shift 0
Physics

Physics · 2006 · Shift 0

49 questions from this JEE Main paper

Electromagnetic Waves1 questions Electronic Devices5 questions Dual Nature of Radiation3 questions Electromagnetic Induction3 questions Magnetic Properties of Matter1 questions Magnetics2 questions Alternating Current2 questions Geometrical Optics1 questions Atoms and Nuclei3 questions Current Electricity5 questions Properties of Matter2 questions Heat and Thermodynamics3 questions Rotational Motion3 questions Simple Harmonic Motion3 questions Waves1 questions Electrostatics3 questions Motion in A Straight Line1 questions Work Power and Energy4 questions Center of Mass3 questions

Q83.The $r m s$ value of the electric field of the light coming from the Sun is $720 N / C .$ The average total energy density of the electromagnetic wave is
Physics · Electromagnetic Waves · MCQ
Q84.The circuit has two oppositively connected ideal diodes in parallel. What is the current following in the circuit? Includes diagram
Physics · Electronic Devices · MCQ
Q85.In the following, which one of the diodes is reverse biased?
Physics · Electronic Devices · MCQ
Q86.The anode voltage of a photocell is kept fixed. The wavelength $λ$ of the light falling on the cathode is gradually changed. The plate current $I$ of the photocell varies as follows
Physics · Dual Nature of Radiation · MCQ
Q87.If the lattice constant of this semiconductor is decreased, then which of the following is correct? Includes diagram
Physics · Electronic Devices · MCQ
Q88.An inductor $(L = 100 m H)$ , a resistor $(R = 100 Ω)$ and a battery $(E = 100 V)$ are initially connected in series as shown in the figure. After a long time the battery is disconnected after short… Includes diagram
Physics · Electromagnetic Induction · MCQ
Q89.Needles $N_{1}$ , $N_{2}$ and $N_{3}$ are made of ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them will
Physics · Magnetic Properties of Matter · MCQ
Q90.In a region, steady and uniform electric and magnetic fields are present. These two fields are parallel to each other. A charged particle is released from rest in this region. The path of the particle will be a
Physics · Magnetics · MCQ
Q91.A long solenoid has $200$ turns per $c m$ and carries a current $i .$ The magnetic field at its center is $6.28 \times 1 0^{- 2} W e b er / m^{2} .$ Another long solenoid has $100$ turns per $c m$ and it carries a current $\frac{i}{3}$ . The…
Physics · Magnetics · MCQ
Q92.Which of the following units denotes the dimension $\frac{M L ^{2}}{Q ^{2}}$ , where $Q$ denotes the electric charge?
Physics · Electromagnetic Induction · MCQ
Q93.In an $A C$ generator, a coil with $N$ turns, all of the same area $A$ and total resistance $R,$ rotates with frequency $ω$ in a magnetic field $B .$ The maximum value of $e m f$ generated in the coil is
Physics · Alternating Current · MCQ
Q94.In a series resonant $L C R$ circuit, the voltage across $R$ is $100$ volts and $R = 1 k Ω$ with $C = 2 μ F .$ The resonant frequency $ω$ is $200 r a d / s$ . At resonance the voltage across $L$ is
Physics · Alternating Current · MCQ
Q95.The flux linked with a coil at any instant $^{'} t^{'}$ is given by $ϕ = 10 t^{2} - 50 t + 250$ The induced $e m f$ at $t = 3 s$ is
Physics · Electromagnetic Induction · MCQ
Q96.The refractive index of a glass is $1.520$ for red light and $1.525$ for blue light. Let $D_{1}$ and $D_{2}$ be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then,
Physics · Geometrical Optics · MCQ
Q97.The threshold frequency for a metallic surface corresponds to an energy of $6.2 e V$ and the stopping potential for a radiation incident on this surface is $5 V .$ The incident radiation lies in
Physics · Dual Nature of Radiation · MCQ
Q98.An alpha nucleus of energy $\frac{1}{2} m v^{2}$ bombards a heavy nuclear target of charge $Z e$ . Then the distance of closest approach for the alpha nucleus will be proportional to
Physics · Atoms and Nuclei · MCQ
Q99.The time taken by a photoelectron to come out after the photon strikes is approximately
Physics · Dual Nature of Radiation · MCQ
Q100.If the ratio of the concentration of electrons to that of holes in a semiconductor is $\frac{7}{5}$ and the ratio of currents is $\frac{7}{4},$ then what is the ratio of their drift velocities?
Physics · Electronic Devices · MCQ
Q101.When $_{3} L i^{7}$ nuclei are bombarded by protons, and the resultant nuclei are $_{4} B e^{8}$ , the emitted particles will be
Physics · Atoms and Nuclei · MCQ
Q102.A solid which is not transparent to visible light and whose conductivity increases with temperature is formed by
Physics · Electronic Devices · MCQ
Q103.If the binding energy per nucleon in $_{3}^{7} L i$ and $_{2}^{4} H e$ nuclei are $5.60 M e V$ and $7.06 M e V$ respectively, then in the reaction $p +_{3}^{7} L i \to 2_{2}^{4} H e$ energy of proton must be
Physics · Atoms and Nuclei · MCQ
Q104.The resistance of bulb filmanet is $100Ω$ at a temperature of $10 0^{\circ} C .$ If its temperature coefficient of resistance be $0.005$ per $^{\circ} C$ , its resistance will become $200 Ω$ at a temperature of
Physics · Current Electricity · MCQ
Q105.If the terminal speed of a sphere of gold (density $= 19.5 k g / m^{3}$ ) is $0.2 m / s$ in a viscous liquid (density $= 1.5 k g / m^{3}$ , find the terminal speed of a sphere of silver (density $= 10.5 k g / m^{3}$ ) of the same size in the…
Physics · Properties of Matter · MCQ
Q106.A wire elongates by $l mm$ when a LOAD $W$ is hanged from it. If the wire goes over a pulley and two weights $W$ each are hung at the two ends, the elongation of the wire will be (in $mm$ )
Physics · Properties of Matter · MCQ
Q107.The work of $146 k J$ is performed in order to compress one kilo mole of gas adiabatically and in this process the temperature of the gas increases by $7^{\circ} C .$ The gas is $(R = 8.3 J m o l^{- 1} K^{- 1})$
Physics · Heat and Thermodynamics · MCQ
Q108.Assuming the Sun to be a spherical body of radius $R$ at a temperature of $T K$ , evaluate the total radiant powered incident of Earth at a distance $r$ from the Sun Where r0 is the radius of the Earth and $σ$ is Stefan's constant.
Physics · Heat and Thermodynamics · MCQ
Q109.Two rigid boxes containing different ideal gases are placed on a table. Box A contains one mole of nitrogen at temperature $T_{0},$ while Box contains one mole of helium at temperature $(\frac{7}{3}) T_{0} .$ The boxes are…
Physics · Heat and Thermodynamics · MCQ
Q110.A force of $- F k$ acts on $O,$ the origin of the coordinate system. The torque about the point $(1, - 1)$ is Includes diagram
Physics · Rotational Motion · MCQ
Q111.Starting from the origin a body oscillates simple harmonically with a period of $2 s .$ After what time will its kinetic energy be $75%$ of the total energy?
Physics · Simple Harmonic Motion · MCQ
Q112.The maximum velocity of a particle, executing simple harmonic motion with an amplitude $7 mm,$ is $4.4 m / s .$ The period of oscillation is
Physics · Simple Harmonic Motion · MCQ
Q113.A string is stretched between fixed points separated by $75.0 c m .$ It is observed to have resonant frequencies of $420 H z$ and $315 H z$ . There are no other resonant frequencies between these two. Then, the lowest resonant frequency for this…
Physics · Waves · MCQ
Q114.An electric dipole is placed at an angle of $3 0^{\circ}$ to a non-uniform electric field. The dipole will experience
Physics · Electrostatics · MCQ
Q115.Two spherical conductors $A$ and $B$ of radii $1 mm$ and $2 mm$ are separated by a distance of $5 c m$ and are uniformly charged. If the spheres are connected by a conducting wire then in equilibrium condition, the ratio of the magnitude of…
Physics · Electrostatics · MCQ
Q116.Two insulating plates are both uniformly charged in such a way that the potential difference between them is $V_{2} - V_{1} = 20 V .$ (i.e., plate $2$ is at a higher potential). The plates are separated by $d = 0.1 m$ and can be treated as… Includes diagram
Physics · Electrostatics · MCQ
Q117.A thermocouple is made from two metals, Antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then, an electric current will
Physics · Current Electricity · MCQ
Q118.An electric bulb is rated $220$ volt - $100$ watt. The power consumed by it when operated on $110$ volt will be
Physics · Current Electricity · MCQ
Q119.In a Wheatstone's bridge, three resistance $R$ and $R$ connected in the three arms and the fourth arm is formed by two resistances $S_{1}$ and $S_{2}$ connected in parallel. The condition for the bridge to be balanced will be
Physics · Current Electricity · MCQ
Q120.The current $I$ drawn from the $5$ volt source will be Includes diagram
Physics · Current Electricity · MCQ
Q121.A thin circular ring of mass $m$ and radius $R$ is rotating about its axis with a constant angular velocity $ω$ . Two objects each of mass $M$ are attached gently to the opposite ends of a diameter of the ring. The ring now rotates…
Physics · Rotational Motion · MCQ
Q122.A particle located at x = 0 at time t = 0, starts moving along the positive x-direction with a velocity 'v' that varies as $v = α x$ . The displacement of the particle varies with time as
Physics · Motion in A Straight Line · MCQ
Q123.A mass of $M k g$ is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of $4 5^{\circ}$ with the initial vertical direction is
Physics · Work Power and Energy · MCQ
Q124.A ball of mass $0.2 k g$ is thrown vertically upwards by applying a force by hand. If the hand moves $0.2 m$ while applying the force and the ball goes upto $2 m$ height further, find the magnitude of the force. (consider $g = 10 m / s^{2}$ ).
Physics · Work Power and Energy · MCQ
Q125.A coin is placed on a horizontal platform which undergoes vertical simple harmonic motoin of angular frequency $ω .$ The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time
Physics · Simple Harmonic Motion · MCQ
Q126.A player caught a cricket ball of mass $150 g$ moving at a rate of $20 m / s .$ If the catching process is completed in $0.1 s,$ the force of the blow exerted by the ball on the hand of the player is equal to
Physics · Center of Mass · MCQ
Q127.A particle of mass $100 g$ is thrown vertically upwards with a speed of $5 m / s$ . The work done by the force of gravity during the time the particle goes up is
Physics · Work Power and Energy · MCQ
Q128.The potential energy of a $1 k g$ particle free to move along the $x$ -axis is given by $V (x) = (\frac{x ^{4}}{4} - \frac{x ^{2}}{2}) J$ . The total mechanical energy of the particle is $2 J .$ Then, the maximum…
Physics · Work Power and Energy · MCQ
Q129.A bomb of mass $16 k g$ at rest explodes into two pieces of masses $4 k g$ and $12 k g .$ The velocity of the $12 k g$ mass is $4 m s^{- 1} .$ The kinetic energy of the other mass is
Physics · Center of Mass · MCQ
Q130.Consider a two particle system with particles having masses $m_{1}$ and $m_{2}$ . If the first particle is pushed towards the center of mass through a distance $d,$ by what distance should the second particle is moved, so as to keep the…
Physics · Center of Mass · MCQ
Q131.Four point masses, each of value $m,$ are placed at the corners of a square $A B C D$ of side $l$ . The moment of inertia of this system about an axis passing through $A$ and parallel to $B D$ is
Physics · Rotational Motion · MCQ