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Physics · 2015 · Shift 0

27 questions from this JEE Main paper

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2015 · Shift 0
Physics

Physics · 2015 · Shift 0

27 questions from this JEE Main paper

Atoms and Nuclei1 questions Electronic Devices1 questions Geometrical Optics1 questions Alternating Current2 questions Wave Optics2 questions Electromagnetic Induction1 questions Magnetics2 questions Motion in A Straight Line1 questions Current Electricity2 questions Electrostatics2 questions Capacitor1 questions Simple Harmonic Motion3 questions Gravitation1 questions Heat and Thermodynamics3 questions Laws of Motion1 questions Rotational Motion1 questions Center of Mass2 questions

Q43.As an electron makes a transition from an excited state to the ground state of a hydrogen - like atom/ion :
Physics · Atoms and Nuclei · MCQ
Q44.A red $L E D$ emits light at $0.1$ watt uniformly around it. The amplitude of the electric field of the light at a distance of $1 m$ from the diode is :
Physics · Electronic Devices · MCQ
Q45.Monochromatic light is incident on a glass prism of angle $A$ . If the refractive index of the material of the prism is $μ$ , a ray, incident at an angle $θ$ . on the face $A B$ would get transmitted through the face $A C$ of the prism… Includes diagram
Physics · Geometrical Optics · MCQ
Q46.An inductor $(L = 0.03 H)$ and a resistor $(R = 0.15 k Ω)$ are connected in series to a battery of $15 V E M F$ in a circuit shown below. The key $K_{1}$ has been kept closed for a long time. Then at $t = 0$ , $K_{1}$ is… Includes diagram
Physics · Alternating Current · MCQ
Q47.An $L C R$ circuit is equivalent to a damped pendulum. In an $L C R$ circuit the capacitor is charged to $Q_{0}$ and then connected to the $L$ and $R$ as shown below : If a student plots graphs of the square of maximum charge $(Q_{M a x}^{2})$ … Includes diagram
Physics · Alternating Current · MCQ
Q48.Assuming human pupil to have a radius of $0.25 c m$ and a comfortable viewing distance of $25 c m$ , the minimum separation between two objects that human eye can resolve at $500 nm$ wavelength is :
Physics · Wave Optics · MCQ
Q49.On a hot summer night, the refractive index of air is smallest near the ground and increases with height from the ground. When a light beam is directed horizontally, the Huygens' principle leads us to conclude that as it travels, the light…
Physics · Wave Optics · MCQ
Q50.Two coaxial solenoids of different radius carry current $I$ in the same direction. $F_{1}$ be the magnetic force on the inner solenoid due to the outer one and $F_{2}$ be the magnetic force on the outer…
Physics · Electromagnetic Induction · MCQ
Q51.A rectangular loop of sides $10 c m$ and $5 c m$ carrying a current $1$ of $12 A$ is placed in different orientations as shown in the figures below : If there is a uniform magnetic field of $0.3 T$ in the positive $z$ direction, in which… Includes diagram
Physics · Magnetics · MCQ
Q52.Two stones are thrown up simultaneously from the edge of a cliff $240 m$ high with initial speed of $10 m / s$ and $40 m / s$ respectively. Which of the following graph best represents the time variation of relative position of the second stone…
Physics · Motion in A Straight Line · MCQ
Q53.In the circuit shown, the current in the $1Ω$ resistor is : Includes diagram
Physics · Current Electricity · MCQ
Q54.Two long current carrying thin wires, both with current $I,$ are held by insulating threads of length $L$ and are in equilibrium as shown in the figure, with threads making an angle $^{'} θ^{'}$ with the vertical. If wires have mass $λ$ … Includes diagram
Physics · Magnetics · MCQ
Q55.When $5 V$ potential difference is applied across a wire of length $0.1 m,$ the drift speed of electrons is $2.5 \times 1 0^{- 4} m s^{- 1} .$ If the electron density in the wire is $8 \times 1 0^{28} m^{- 3},$ the resistivity…
Physics · Current Electricity · MCQ
Q56.A long cylindrical shell carries positives surfaces change $σ$ in the upper half and negative surface charge - $σ$ in the lower half. The electric field lines around the cylinder will look like figure given in : (figures are…
Physics · Electrostatics · MCQ
Q57.A uniformly charged solid sphere of radius $R$ has potential $V_{0}$ (measured with respect to $\infty$ ) on its surface. For this sphere the equipotential surfaces with potentials $\frac{3 V _{0}}{2}, \frac{5 V _{0}}{4}, \frac{3 V _{0}}{4}$ …
Physics · Electrostatics · Multiple correct
Q58.In the given circuit, charges $Q_{2}$ on the $2 μ F$ capacitor changes as $C$ is varied from $3 μ F . Q_{2}$ to $3 μ F . Q_{2}$ as a function of $^{'} C^{'}$ is given properly by: $(f i g u r es a r e d r a w n sc h e ma t i c a l l y an d a r e n o t t o sc a l e)$ … Includes diagram
Physics · Capacitor · MCQ
Q59.For a simple pendulum, a graph is plotted between its kinetic energy $(K E)$ and potential energy $(P E)$ against its displacement $d .$ Which one of the following represents these correctly? $(g r a p h s a r esc h e ma t i c an d n o t d r a w n t osc a l e)$
Physics · Simple Harmonic Motion · MCQ
Q60.A pendulum made of a uniform wire of cross sectional area $A$ has time period $T .$ When an additional mass $M$ is added to its bob, the time period changes to $T_{M .}$ If the Young's modulus of the material of the wire is $Y$ then $\frac{1}{Y}$ …
Physics · Simple Harmonic Motion · MCQ
Q61.From a solid sphere of mass $M$ and radius $R,$ a spherical portion of radius $R /2$ is removed, as shown in the figure. Taking gravitational potential $V = 0$ at $r = \infty,$ the potential at the center of the cavity thus formed is: ( $G = g r a v i t a t i o na l co n s t an t$ … Includes diagram
Physics · Gravitation · MCQ
Q62.Consider a spherical shell of radius $R$ at temperature $T$ . The black body radiation inside it can be considered as an ideal gas of photons with internal energy per unit volume $u = \frac{U}{V} \propto T^{4}$ and pressure $p = \frac{1}{3} (\frac{U}{V})$ …
Physics · Heat and Thermodynamics · MCQ
Q63.Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion, the average time of collision between molecules increases as $V^{q},$ where $V$ is the volume of the gas. The value of $q$ is: $(γ = \frac{C _{p}}{C _{v}})$ …
Physics · Heat and Thermodynamics · MCQ
Q64.A solid body of constant heat capacity $1 J /^{\circ} C$ is being heated by keeping it in contact with reservoirs in two ways: $(i)$ Sequentially keeping in contact with $2$ reservoirs such that each reservoir supplies…
Physics · Heat and Thermodynamics · MCQ
Q65.Given in the figure are two blocks $A$ and $B$ of weight 20 N and 100 N, respectively. These are being pressed against a wall by a force $F$ as shown. If the coefficient of friction between the blocks is 0.1 and between block $B$ and the… Includes diagram
Physics · Laws of Motion · MCQ
Q66.From a solid sphere of mass $M$ and radius $R$ a cube of maximum possible volume is cut. Moment of inertia of cube about an axis passing through its center and perpendicular to one of its face is:
Physics · Rotational Motion · MCQ
Q67.Distance of the center of mass of a solid uniform cone from its vertex is $z_{0}$ . If the radius of its base is $R$ and its height is $h$ then $z_{0}$ is equal to :
Physics · Center of Mass · MCQ
Q68.A particle of mass $m$ moving in the $x$ direction with speed $2 v$ is hit by another particle of mass $2 m$ moving in the $y$ direction with speed $v .$ If the collision is perfectly inelastic, the percentage loss in the energy during the…
Physics · Center of Mass · MCQ
Q69.The period of oscillation of a simple pendulum is $T = 2 π \frac{L}{g}$ . Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using wrist watch of 1 s resolution.…
Physics · Simple Harmonic Motion · MCQ