- AUndergoes acceleration all the time.
- BSpeeds up between the dees because of the magnetic field.
- CSpeeds up in a dee.
- DSlows down within a dee and speeds up between dees.
Solution:
In a cyclotron, a charged particle describes the circular path inside the dees & is accelerated while going from one dee to another due to the electric field.
While moving in the circular path, charged particles have centripetal acceleration which is provided by the magnetic force due to the magnetic field.
A charged particle undergoes acceleration all the time, inside the cyclotron.
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In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 W, the balancing length becomes 120 cm. The internal resistance of the cell is
|
(a) 4 W |
(b) 2 W |
(c) 1 W |
(d) 0.5 W |
A 36 W galvanometer is shunted by resistance of 4W. The percentage of the total current, which passes through the galvanometer is
|
(a) 8 % |
(b) 9 % |
(c) 10 % |
(d) 91 % |
The true statement for thermo e.m.f. of a thermocouple
|
(a) Depends on the nature of metals |
|
(b) Depends only on temperature of cold junction |
|
(c) Depends only on temperature of hot junction |
|
(d) Depends on the length of the wires used for thermocouple |
A circular current carrying coil has a radius R. The distance from the centre of the coil on the axis where the magnetic induction will be to its value at the centre of the coil, is
|
(a) |
(b) R |
(c) 2 |
(d) |
A curve between magnetic moment and temperature of magnet is
|
(a) |
(b) |
(c) |
(d) |
Potential at a point x-distance from the centre inside the conducting sphere of radius R and charged with charge Q is
|
(a) |
(b) |
(c) |
(d) xQ |
The energy of a photon of light with wavelength 5000 Å is approximately 2.5 eV. This way the energy of an X-ray photon with wavelength 1Å would be
|
(a) 2.5/5000 eV |
(b) |
(c) 2.5 × 5000 eV |
(d) |
Through which mode of propagation, the radio waves can be sent from one place to another
|
(a) Ground wave propagation |
(b) Sky wave propagation |
|
(c) Space wave propagation |
(d) All of them |