MCQ
Fast neutrons can easily be slowed down by
- AThe use of lead shielding
- ✓Passing them through water
- CElastic collisions with heavy nuclei
- DApplying a strong electric field
✓
Answer
Correct option: B.
Passing them through water
b
(b)Heavy water is used as moderators in nuclear reactions to slow down the neutrons.
(b)Heavy water is used as moderators in nuclear reactions to slow down the neutrons.
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
An effective power of a combination of $5$ identical convex lenses which are kept in contact along the principal axis is $25 \mathrm{D}$. Focal length of each of the convex lens is:
→The time period of a charged particle undergoing a circular motion in a uniform magnetic field is independent of its
In given $L - R$ circuit
→A current of $3\,amp$ flows through the $2\,\Omega $ resistor shown in the circuit. The power dissipated in the $5\,\Omega $ resistor is ................. $watt$
→In given $LCR$ circuit, the voltage across the terminals of a resistance and current will be
→A wire frame $PQRSTU$ is moving horizontally with velocity $v$ in a uniform magnetic field $B$ acting perpendicular to its plane as shown in the figure. Choose the $INCORRECT$ statement
→In the circuit shown $P \ne R$, the reading of the galvanometer is same with switch $S$ open or closed. Then
→If radii of curvature of both convex surfaces is $20 \,cm$, then focal length of the lens for an object placed in air in the given arrangement is .......... $CM$
→A solenoid is tightly wound with wire of diameter $0.10\,cm$ , has a cross-sectional area $\frac {1}{\pi }\,cm^2$ and is $40\,cm$ long. If current through the solenoid decreases uniformly from $10\,A$ to $0\,A$ in $0.10\,s$ . Then $emf$ induced inside the solenoid is.....$mV$
→The transverse nature of light is shown by