Question
In X-ray experiment Ka, Kb denotes
|
(a) Characteristic |
(b) Continuous wavelength |
|
(c) a, b-emissions respectively |
(d) None of these |
✓
Answer
(a) Characteristic
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A moving charge produces:
- Electric field only.
- Magnetic field only.
- Both of them.
- None of them.
In a Young’s double slit experiment, the slit separation is 1 mm and the screen is 1 m from the slit. For a monochromatic light of wavelength 500 nm, the distance of 3rd minima from the central maxima is
|
(a) 0.50 mm |
(b) 1.25 mm |
(c) 1.50 mm |
(d) 1.75 mm |
A hollow metallic sphere of radius R is given a charge Q. Then the potential at the centre is
|
(a) Zero |
(b) |
(c) |
(d) |
The half-life of a radioactive substance is 3.6 days. How much of 20 mg of this radioactive substance will remain after 36 days
|
(a) 0.0019 mg |
(b) 1.019 mg |
(c) 1.109 mg |
(d) 0.019 mg |
If the capacitors in the previous question are joined in parallel, the capacitance and the breakdown voltage of the combination will be:
Nucleus produced due to a-decay of the nucleus 
is
|
(a) |
(b) |
(c) |
(d) |
In an endothermic reaction the binding energies of reactants and products are e1, e2 respectively, then:
An object has image thrice of its original size when kept at 8 cm and 16 cm from a convex lens. Focal length of the lens is
|
(a) 8 cm |
(b) 16 cm |
|
(c) Between 8 cm and 16 cm |
(d) Less than 8 cm |
According to Maxwell's equation, the velocity of light in any medium is expressed as.
A particle of charge +q and mass m moving under the influence of a uniform electric field 
and a uniform magnetic field 
follows trajectory from P to Q as shown in figure. The velocities at P and Q are v
and -2v
respectively. Which of the following statement(s) is/are correct
|
(a) E = |
|
(b) Rate of work done by electric field at P is |
|
(c) Rate of work done by both the fields at Q is zero |
|
(d) a, b, c |
