Physics Times 07.2019
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Electromagnetic Induction 1.Magnetic Flux() The magnetic flux through a small surface of area dA is d B dA (^) B -m ...
Magnitude of Induced Electric field A time varying magnetic field always produces an electric field. The electric field that w ...
(II) Equivalent inductance(when M0) When fluxes support each other L L L M 1 2 2 When fluxes oppose each other L L L M ...
Energy in the inductor is 2 2 2 1 2 sin 2 2 UL Li Lqo t Total energy 2 . 2 o C L T E U U q C Here^1 LC Electromagn ...
E E j E sin k yˆ 0 x- t (Ex = Ez = 0) B B k B sin k zˆ 0 x- tkˆ (Bx = By = 0) The magnitudes of E and B ...
A wire along x-axis carries a current 3.5A. The force on a 1 cm section of the wire exerted by the magnetic field Magnetis ...
ELASTICITY [2018] [2015] [2015] ELASTICITY Two wires are made of the same material and have the same volume. Th ...
2.The cylindrical tube of a spray pump has radius R, one end of which has n fine holes, each of radius r. If the speed of the li ...
2.Sol: Young’s modulus W l Y= AΔl l, A and l are the same for both the wires. Y W 2 1 s s b b Y W = Y W (^) W Ws: 2:1b 3. ...
SECTION-1 More than one answer type questions 1.An electric dipole with dipole moment (^0) ( )ˆ ˆ 2 p i j is held fixed at the ...
change in momentum of atom due to the absorption and the emission are pa and pe respectively. If a/ 1/5e , which of the op ...
the spring is x 0. Which of the following option(s) is/are correct? [g is the acceleration due to gravity. Neglect friction] (a) ...
A monochromatic light is incident from air on a refracting surface of a prism of angle 75° and refractive index n 0 3. The ot ...
(IV) String-4 (4) (S) 1 3 (T) 3/16 (U) 1/16 If the tension in each string is T 0 , the correct match for the highest fundament ...
match is (a)I S II R III Q IV T , , , (b) I Q II R III P IV U , , , (c) I Q II S III R IV U , , , (d) I Q I ...
^ 4.Sol: Mg N Ma v 16 Mg N 3.Sol: As 2 1 13.6 & eV E E n 4 2 4 1 1 1 16 1 / (^15) 1 16 m a e E E m E E ...
(^2) 600 20.684 29 H cm Case-III: 2 1 2 1 ; n n n n v u R 3 3 1 3 1 2 H 2 30 300 ; (^3) 600 19.354 31 H ...
3.Sol: 0 16 3 Mg x k 2 (^2220) (^004) x v x x x (^0) 3 3 16 3 32 2 2 3 14 Mg K M v x g K M K 0 0 2 0 4 3 2 ...
For T.I.R at coated surface sin 3 c n Appling snell’s law at first surface sin 3sin(75 ) c sin60 3sin(75 ) c 3 3sin(7 ...
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