The magnetic force acting on a charged particle of charge -2 μC in a magnetic field of 2T acting in y direction, when the particle velocity is
8N in -z direction
4N in z direction
8 N in y direction
8 N in y direction
See the electrical circuit shown in this figure. Which of the following equations is a correct equation for it?
The two ends f a rod of length L and a uniform cross -sectional area A are kept at two temperatures T1 and T2 (T2 > T1) .The rate of heat transfer, dQ/dt, through the rod in steady state is given by
A galvanometer having a coil resistance of 60 Ω shows full-scale deflection when a current of 1.0 A passes through it. It can be converted into an ammeter to read currents up to 5.0 A by
putting in parallel a resistance of 240 Ω
putting in series a resistance of 15 Ω
putting in series a resistance of 240 Ω
putting in series a resistance of 240 Ω
The electric potential at a point (x, y, Z) is given by
V = - x2y -xz3 + 4
The electric field E at that point is
In the nuclear decay given below,
the particle emitted in the sequence are
β, α, γ
γ, β, α,
β,γ, α
β,γ, α
A.
β, α, γ
In a nuclear reaction conservation of charge number and mass, the number must hold good.
Alpha particles are positively charged particles with charge +2e and mass 4 m. Emission of an α particle reduces the mass of the radionuclide by 4 and its atomic number by 2. β- particles are negatively charged particles with rest mass as well as charge same as that of electrons. γ particles carry no charge and mass.
Radioactive transition will be as follows.
A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It ca detect a signal of wavelength
6000 Ao
4000 nm
6000 nm
6000 nm
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is
repelled by both the poles
repelled by the north pole and attracted by the south pole
attracted by the north pole and repelled by the south pole
attracted by the north pole and repelled by the south pole
The number of beta particles emitted by radioactive substance is twice the number of alpha particle emitted by it. The resulting daughter is an
isobar of parent
isomer of parent
isotone of parent
isotone of parent