MCQ
The continuous X-rays spectrum produced by an X-ray machine at constant voltage has
- AA maximum wavelength
- ✓A minimum wavelength
- CA single wavelength
- DA minimum frequency
✓
Answer
Correct option: B.
A minimum wavelength
Continuous spectrum of $X$-rays consists of radiations of all possible wavelength range having a definite short wavelength limit.
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
Identify the wrong description of the above figures
Which of the following statements is not true ? In the case of a simple pendulum for small amplitudes the period of oscillation is
Which of the accompanying $P V$, diagrams best represents an isothermal process
→Refractive index of glass is $\frac{3}{2}$ and refractive index of water is $\frac{4}{3}$. If the speed of light in glass is $2.00 \times 10^8 \mathrm{~m} / \mathrm{s}$, the speed in water will be
→A motor having an armature of resistance $2 \Omega$ is designed to operate at $220 V$ mains. At full speed, it develops a back e.m.f. of $210 \mathrm{~V}$. When the motor is running at full speed, the current in the armature is
→A convex lens produces a real image $m$ times the size of the object. What will be the distance of the object from the lens
→The magnitude of the earth's magnetic field at a place is $B_0$ and the angle of dip is $\delta$. A horizontal conductor of length / lying along the magnetic north-south moves eastwards with a velocity $v$. The emf induced across the conductor is
→A monoatomic ideal gas, initially at temperature $T_1$, is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature. $T_2$ by releasing the piston suddenly. If $L_1$ and $L_2$ are the lengths of the gas column before and after expansion respectively, then $T_1 / T_2$ is given by
→The rates of cooling of two different liquids put in exactly similar calorimeters and kept in identical surroundings are the same if
At atmospheric pressure, the water boils at $100^{\circ} \mathrm{C}$. If pressure is reduced, it will boil at
→