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The magnetic field and number of turns of the coil of an electric generator is doubled then the magnetic flux of the coil will:
AB and CD are smooth parallel rails, separated by a distance l, and inclined to the horizontal at an angle q. A uniform magnetic field of magnitude B, directed vertically upwards, exists in the region. EF is a conductor of mass m, carrying a current i. For EF to be in equilibrium,
Two different arrangements in which two square wire frames of same resistance are placed in a uniform constantly decreasing magnetic field B.
The direction of induced current in the case II is
The power factor of an RL circuit 1/root2. If the frequency of a.c. is doubled, what will be the power factor?
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): The mirror formula 1/v + 1/u = 1/f is valid for mirrors of small aperture.
Reason (R): Laws of reflection of light is valid for only plane surface and not for large spherical surface.
Directions : In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): If the objective lens and the eyepiece lens of a microscope are interchanged, it works as a telescope.
Reason (R): Objective lens of telescope require large focal length and eyepiece lens require small focal length.
Which of the following statement is correct regarding AC generators?
In the series LCR circuit, the power dissipation is through:
In the given figure a metallic plate A is allowed to swing like a simple pendulum between the magnetic poles and it comes to rest after time t. If a slot is cut in the plate A and then it is allowed to swing with the same initial velocity as before then the time taken by it to come to rest will be:
During the magnetic braking of trains if the north and the south poles are replaced with each other, then the velocity of the train will:
A coil of wire of radius R has 200 turns and self – inductance of 108 mH. The self – inductance of a similar coil of 500 turns will be:
The value of alternating emf E in the given circuit will be:
In the second experiment of Faraday and Henry, the primary coil is connected to the galvanometer and the secondary coil is connected to a battery. If the primary coil is rotated about its axis, then:
When the north pole of a magnet is moved towards a coil that is connected to a circuit, consider the following statement:
a. North pole will be formed on the magnet side of the coil.
b. South pole will be formed on the magnet side of the coil.
c. Direction of Induced current will be clockwise when the coil is seen from the magnet side.
d. Direction of Induced current will be anti clockwise when the coil is seen from the magnet side.
Two long solenoids S_{1 }and S_{2} have equal lengths and the solenoid S_{1} is placed coaxially inside the solenoid S_{2}. If the current in both the solenoids is doubled, then the mutual inductance of both the solenoids will become:
An ideal transformer has 500 and the 1000 turns in the primary and the secondary coil. If the DC voltage of 120 V is applied to the primary coil, then the emf produced at the secondary coil will be:
A magnet NS is suspended from a spring and while it oscillates, the magnet moves in and out of the coil. The coil is connected to a galvanometer G. Then, as the magnet oscillates,
Which of the following electromagnetic waves have the longest wavelength?
A coil has an inductance of 2H and resistance of 4Ω. A 10V is applied across the coil. The energy stored in the magnetic field after the current has built up to its equilibrium value will be ___________ × 10^{−2} J.
A point source of light is placed at the centre of curvature of a hemispherical surface. The source emits a power of 24 W. The radius of curvature of hemisphere is 10 cm and the inner surface is completely reflecting. The force on the hemisphere due to the light falling on it is ____________ × 10^{−8} N.
As shown in the figure, in Young's double slit experiment, a thin plate of thickness t = 10μm and refractive index μ = 1.2 is inserted infront of slit S_{1}. The experiment is conducted in air (μ = 1) and uses a monochromatic light of wavelength λ = 500 nm. Due to the insertion of the plate, central maxima is shifted by a distance of x β_{0}. β_{0} is the fringewidth befor the insertion of the plate. The value of the x is _____________.
A conducting circular loop is placed in a uniform magnetic field of 0.4 T with its plane perpendicular to the field. Somehow, the radius of the loop starts expanding at a constant rate of 1 mm / s . The magnitude of induced emf in the loop at an instant when the radius of the loop is 2 cm will be ___________ μV.
A metallic cube of side 15 cm moving along yaxis at a uniform velocity of 2 ms^{1}. In a region of uniform magnetic field of magnitud 0.5 T directed along z  axis. In equilibrium the potential difference between the faces of higher and lower potential developed because of the motion through the field will be _________ mV.
Type of isomerism exhibited by [Cr(NCS)(NH_{3})_{5}] [ZnCl_{4}] :
A complex compound in which the oxidation number of a metal is zero is
Trioxalato aluminate (III) and tetrafluoridoborate (III) ions are respectively :
Which of the ligand can show linkage isomerism and acts as flexidentate ligand:
Consider the following statements, "According the Werner's theory. :
(1) Ligands are connected to the metal ions by covalent bonds.
(2) Secondary valencies have directional properties.
(3) Secondary valencies are nonionisable.
(4) Secondary valencies are satisfied by either neutral or negative legands.
Of these statements.
Ammonia acts as a very good ligand but ammonium ion does not form complexes because:
Meso tartaric acid does not show optical activity because:
The sum of coordination number and oxidation number of the metal M in the complex [M(en)_{2}(C_{2}O_{4})]Cl (where (en) is ethylenediamine) is
The I.U.P.A.C name of the coordination compound K_{3 }[Fe (CN)_{6}] is:
Which of the following compounds has three fused benzene rings in its structure?
If 208 kJ/mol and 120 kJ/mol respectively are the observed heats of hydrogenation of cyclohexene and benzene, then the resonance energy of benzene in kJ/mol is (In integer)
The ratio x/y on completion of the above reaction is __________.
In the presence of sunlight, benzene reacts with Cl_{2} to give product, X. The number of hydrogens in X is _____________.
The major product of the following reaction contains ____________ bromine atom(s).
For a function g(x), g(x) is continuous for all x ∈ R. If g(0) = g'(1) = 1 and then what is the value of g(1)?
The area (in sq.units) of the region {(x, y) ∈ R^{2} : x^{2} ≤ y ≤ 3  2x} is
The area (in sq. units) of the region A = {(x, y) : (x  1) [x] ≤ y ≤ 2 √x, 0 ≤ x ≤ 2}, where [t] denotes the greatest integer function, is
The maximum and minimum value of f(x) = ab sin x + b cos x + c lie in the interval (assuming a < 1, b > 0)
A given right circular cone has a volume p, and the largest right circular cylinder that can be inscribed in the cone has a volume q. Then p : q is
An object is moving in clockwise direction around the unit circle x^{2} + y^{2} = 1. As it passes through the point (1/2, √3/2), its ycoordinate is decreasing at the rate of 3 units per second. The rate at which the xcoordinate changes at this point is (in units per second)
The tangent to the curve y = e^{x} drawn at the point (c, e^{c}) intersects the line joining the points (c – 1, e^{c}^{–1}) and (c + 1, e^{c + 1})
The abscissa of the point on the curve 9y^{2 }= x^{3}, the normal at which cuts off equal intercepts on the coordinate axes is
f(x) = sin^{p} θ cos^{q} θ, (p, q > 0, 0 < θ < π/2) has a point of maxima at
Let f: (2, 2) → R be defined by where [x] enotes the greatest integer function. If m and n respectively are the number of points in (2, 2) at which y = f(x) is not continuous and not differentiable, then m + n is equal to ____________.
Let k and m be positive real numbers such that the function is differentiable for all is equal to ____________.
Let [x] be the greatest integer ≤ x. Then the number of points in the interval (2, 1), where the function f (x) = [x] + is discontinuous, is ___________.
Let where [α] denotes the greatest integer less than or equal to α. Then the number of points in R where f is not differentiable is ___________.
357 docs148 tests

JEE Main Part Test  6 Test  75 ques 
Schedule and Syllabus of JEE Mock Test Series Doc  1 pages 
357 docs148 tests

JEE Main Part Test  6 Test  75 ques 
Schedule and Syllabus of JEE Mock Test Series Doc  1 pages 