A particle of mass m having negative charge q moves along an ellipse around a fixed positive charge Q so that its maximum and minimum distances from fixed charge are equal to `r_(1) " and " r_(2)` respectively. Calculate angular momentum L of this particle:
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The acceleration of a particle moving along x-axis is given by a = 6t. Initially it has a velocity of ` 4m//s` along negative x-direction and it is at
Correct Answer - C a = 6t `v implies 3t^(2)-4` `ximplies t^(3)-4t` `x = 0 implies (t^(2)-4)` t = 0.2
2 Answers 1 views
A particle of mass 40 mg and carrying a charge `5 xx 10^(-9) C` is moving directly towards a fixed positive point charge on magnitude `10^(-8) C`. Whe
If the particle comes to rest momentarily at a distance r from the fixed charge, then from conservation of energy, we have ? `1/2 m u^(2) +1/(4pi epsi_(0)) (Qq)/a=1/(4pi epsi_(0))...
2 Answers 5 views
A particle having specific charge s is projected in xy plane with a speed V. There exists a uniform magnetic field in z direction having a fixed magni
Correct Answer - `(4v)/(sigmaB_(0))`
2 Answers 1 views
Electric field E = – bx + a exists in a region parallel to the X direction (a and b are positive constants). A charge particle having charge q and mas
Correct Answer - `-(qa)/(m)`
2 Answers 1 views
A particle (A) having charge Q and mass m is at rest and is free to move. Another particle (B) having charge q and mass m is projected from a large di
Correct Answer - (a). `(1)/(4)m u^(2)` (b). A moves to right with velocity u. B is at rest .
2 Answers 1 views
A `mu` – meson (charge `= – e`, mass`= 208 m_(e)`) moves in a circular orbit around a heavy nucleus having charge `+ 3e`. Find the quantum state n for
Correct Answer - `n = 25`
2 Answers 1 views
A positively charged particle having charge `q_1 = 1 C` and mass `m_1 =40 gm` is revolving along a circle of radius `R=40 cm` with velocity `v_1 = 5 m
Correct Answer - [(0.2m, 0.2m, 0.2 m)]
2 Answers 1 views
A negative charge `q_(1)=50 xx 10^(-9)C` and a positive charge `q_(2)=25 xx 10^(-9)C` are fixed at a distance l=20cm. Where should a thrid charge q be
Correct Answer - 0.48m, Fig1.10(see below),stable.
2 Answers 1 views
A small brass having a positive charge of `1.7xx10^(-8)` C is made to touch another sphere of the same radius having a negative charge of `3.0xx10^(-9
Correct Answer - `1.1 xx 10^(-5)N;0.367 xx 10 ^(-5)N`
2 Answers 3 views
A particle of mass `m` and charge `-q` moves along a diameter of a uniformly charged sphere of radius `R ` and carrying a total charge ` +Q`. Find the
Correct Answer - `[(1)/(2pi) sqrt((qQ)/(4 pi in_(0)mR^(3)))]`
2 Answers 1 views