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Physics · 2007 · Shift 0

37 questions from this JEE Main paper

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2007 · Shift 0
Physics

Physics · 2007 · Shift 0

37 questions from this JEE Main paper

Atoms and Nuclei2 questions Electronic Devices2 questions Dual Nature of Radiation1 questions Geometrical Optics1 questions Wave Optics1 questions Electromagnetic Induction1 questions Alternating Current1 questions Magnetics5 questions Current Electricity1 questions Capacitor2 questions Gravitation1 questions Electrostatics3 questions Work Power and Energy2 questions Waves1 questions Simple Harmonic Motion4 questions Heat and Thermodynamics3 questions Rotational Motion3 questions Center of Mass1 questions Laws of Motion1 questions Motion in A Straight Line1 questions

Q63.If $M_{O}$ is the mass of an oxygen isotope $_{8} O^{17}$ , $M_{p}$ and $M_{N}$ are the masses of a proton and neutron respectively, the nuclear binding energy of the isotope is
Physics · Atoms and Nuclei · MCQ
Q64.If in a $p$ - $n$ junction diode, a square input signal of $10 V$ is applied as shown Then the output signal across $R_{L}$ will be Includes diagram
Physics · Electronic Devices · MCQ
Q65.Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?
Physics · Electronic Devices · MCQ
Q66.Which of the following transitions in hydrogen atoms emit photons of highest frequency ?
Physics · Atoms and Nuclei · MCQ
Q67.Photon of frequency $v$ has a momentum associated with it. If $c$ is the velocity of light, the momentum is
Physics · Dual Nature of Radiation · MCQ
Q68.Two lenses of power $- 15 D$ and $+ 5 D$ are in contact with each other. The focal length of the combination is
Physics · Geometrical Optics · MCQ
Q69.In a Young's double slit experiment the intensity at a point where the path difference is $\frac{λ}{6}$ ( $λ$ being the wavelength of light used ) is $I$ . If $I_{0}$ denotes the maximum intensity, $\frac{I}{I _{0}}$ is equal to
Physics · Wave Optics · MCQ
Q70.An ideal coil of $10 H$ is connected in series with a resistance of $5Ω$ and a battery of $5 V$ . $2$ second after the connection is made, the current flowing in ampere in the circuit is
Physics · Electromagnetic Induction · MCQ
Q71.In an $a . c .$ circuit the voltage applied is $E = E_{0} sin ω t .$ The resulting current in the circuit is $I = I_{0} sin (ω t - \frac{π}{2}) .$ The power consumption in the circuit is given by
Physics · Alternating Current · MCQ
Q72.Two identical conducting wires $A O B$ and $C O D$ are placed at right angles to each other. The wire $A O B$ carries an electric current $I_{1}$ and $C O D$ carries a current $I_{2}$ . The magnetic field on a point lying at a distance $d$ from…
Physics · Magnetics · MCQ
Q73.A charged particle moves through a magnetic field perpendicular to its direction. Then
Physics · Magnetics · MCQ
Q74.A long straight wire of radius $a$ carries a steady current $i .$ The current is uniformly distributed across its cross section. The ratio of the magnetic field at $a /2$ and $2 a$ is
Physics · Magnetics · MCQ
Q75.A current $I$ flows along the length of an infinitely long, straight, thin walled pipe. Then
Physics · Magnetics · MCQ
Q76.A charged particle with charge $q$ enters a region of constant, uniform and mutually orthogonal fields $E$ and $B$ with a velocity $v$ perpendicular to both $E$ and $B,$ …
Physics · Magnetics · MCQ
Q77.The resistance of a wire is $5$ ohm at $5 0^{\circ} C$ and $6$ ohm at $10 0^{\circ} C .$ The resistance of the wire at $0^{\circ} C$ will be
Physics · Current Electricity · MCQ
Q78.A battery is used to charge a parallel plate capacitor till the potential difference between the plates becomes equal to the electromotive force of the battery. The ratio of the energy stored in the capacitor and the work done by the…
Physics · Capacitor · MCQ
Q79.If $g_{E}$ and $g_{M}$ are the accelerations due to gravity on the surfaces of the earth and the moon respectively and if Millikan's oil drop experiment could be performed on the two surfaces, one will find the ratio $\frac{e l ec t r o c h a r g e o n t h e m oo n}{e l ec t r o ni c c h a r g e o n t h e e a r t h} t o b e$ …
Physics · Gravitation · MCQ
Q80.A parallel plate condenser with a dielectric of dielectric constant $K$ between the plates has a capacity $C$ and is charged to a potential $V$ volt. The dielectric slab is slowly removed from between the plates and then reinserted. The…
Physics · Capacitor · MCQ
Q81.Charges are placed on the vertices of a square as shown. Let $E$ be the electric field and $V$ the potential at the center. If the charges on $A$ and $B$ are interchanged with those on $D$ and $C$ respectively, then Includes diagram
Physics · Electrostatics · MCQ
Q82.The potential at a point $x$ (measured in $μ m$ ) due to some charges situated on the $x$ -axis is given by $V (x) = 20/ (x^{2} - 4)$ volt The electric field $E$ at $x = 4 μ m$ is given by
Physics · Electrostatics · MCQ
Q83.A $2 k g$ block slides on a horizontal floor with a speed of $4 m / s .$ It strikes a uncompressed spring, and compress it till the block is motionless. The kinetic friction force is $15 N$ and spring constant is $10, 000 N / m .$ The spring…
Physics · Work Power and Energy · MCQ
Q84.An electric charge $1 0^{- 3} μ C$ is placed at the origin $(0, 0)$ of $X - Y$ co-ordinate system. Two points $A$ and $B$ are situated at $(2, 2)$ and $(2, 0)$ respectively. The potential…
Physics · Electrostatics · MCQ
Q85.A sound absorber attenuates the sound level by $20 d B$ . The intensity decreases by a factor of
Physics · Waves · MCQ
Q86.The displacement of an object attached to a spring and executing simple harmonic motion is given by $x = 2 \times 1 0^{- 2} cos π t$ metre. The time at which the maximum speed first occurs is
Physics · Simple Harmonic Motion · MCQ
Q87.A point mass oscillates along the $x$ -axis according to the law $x = x_{0} cos (ω t - π /4) .$ If the acceleration of the particle is written as $a = A cos (ω t + δ),$ then
Physics · Simple Harmonic Motion · MCQ
Q88.Two springs, of force constant $k_{1}$ and $k_{2}$ are connected to a mass $m$ as shown. The frequency of oscillation of the mass is $f .$ If both $k_{1}$ and $k_{2}$ are made four times their original values, the frequency of oscillation… Includes diagram
Physics · Simple Harmonic Motion · MCQ
Q89.A particle of mass $m$ executes simple harmonic motion with amplitude a and frequency $v .$ The average kinetic energy during its motion from the position of equilibrium to the end is
Physics · Simple Harmonic Motion · MCQ
Q90.One end of a thermally insulated rod is kept at a temperature $T_{1}$ and the other at $T_{2}$ . The rod is composed of two sections of length $L_{1}$ and $L_{2}$ and thermal conductivities $K_{1}$ and $K_{2}$ respectively. The temperature… Includes diagram
Physics · Heat and Thermodynamics · MCQ
Q91.When a system is taken from state $i$ to state $f$ along the path iaf, it is found that $Q = 50$ cal and $W = 20 c a l$ . Along the path $ib f Q = 36 c a l . W$ along the path $ib f$ is Includes diagram
Physics · Heat and Thermodynamics · MCQ
Q92.For the given uniform square lamina $A B C D$ , whose center is $O,$ Includes diagram
Physics · Rotational Motion · MCQ
Q93.If $C_{p}$ and $C_{v}$ denote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then
Physics · Heat and Thermodynamics · MCQ
Q94.Angular momentum of the particle rotating with a central force is constant due to
Physics · Rotational Motion · MCQ
Q95.A round uniform body of radius $R,$ mass $M$ and moment of inertia $I$ rolls down (without slipping) an inclined plane making an angle $θ$ with the horizontal. Then its acceleration is
Physics · Rotational Motion · MCQ
Q96.A circular disc of radius $R$ is removed from a bigger circular disc of radius $2 R$ such that the circumferences of the discs coincide. The center of mass of the new disc is $α R$ form the center of the bigger disc. The value of $α$ …
Physics · Center of Mass · MCQ
Q97.A block of mass $m$ is connected to another block of $ma ss M$ by a spring (massless) of spring constant $k .$ The block are kept on a smooth horizontal plane. Initially the blocks are at rest and the spring is unstretched. Then a constant…
Physics · Laws of Motion · MCQ
Q98.The velocity of a particle is v = v0 + gt + ft2. If its position is x = 0 at t = 0, then its displacement after unit time (t = 1) is
Physics · Motion in A Straight Line · MCQ
Q99.A particle is projected at $6 0^{\circ}$ to the horizontal with a kinetic energy K. The kinetic energy at the highest point is
Physics · Work Power and Energy · MCQ