A nucleus
emits one α and one β particles. The resulting nucleus is
|
(a) |
(b) |
(c) |
(d) |
A nucleus
emits one α and one β particles. The resulting nucleus is
|
(a) |
(b) |
(c) |
(d) |
(d)
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Assertion : The induced e.m.f. and current will be same in two identical loops of copper and aluminium, when rotated with same speed in the same magnetic field.
Reason : Induced e.m.f. is proportional to rate of change of magnetic field while induced current depends on resistance of wire.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If assertion is false but reason is true. |
The de-Broglie wavelength of a particle accelerated with 150 volt potential is
m. If it is accelerated by 600 volts p.d., its wavelength will be
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(a) 0.25 Å |
(b) 0.5 Å |
(c) 1.5 Å |
(d) 2 Å |
The half life (T) and the disintegration constant (λ) of a radioactive substance are related as
|
(a) λT = 1 |
(b) λT = 0.693 |
(c) |
(d) |
In order to increase the angular magnification of a simple microscope, one should increase:
The distance travelled by light in glass (refractive index =1.5) in a nanosecond will be
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(a) 45 cm |
(b) 40 cm |
(c) 30 cm |
(d) 20 cm |
An e.m.f. of 5 volt is produced by a self inductance, when the current changes at a steady rate from 3 A to 2 A in 1 millisecond. The value of self inductance is
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(a) Zero |
(b) 5 H |
(c) 5000 H |
(d) 5 mH |