MCQ
The mass of a neutron is:
  • A
    1.00866u
  • B
    1.0866u
  • C
    1.866u
  • D
    0.1866u

Answer

  1. 1.00866u

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Mark the correct options:
  1. An atom with a vacancy has smaller energy that a neutral atom.
  2. K X-ray is emitted when a hole makes a jump from the K shell to some other shell.
  3. The wavelength of K X-ray is smaller than the wavelength of L X-ray of the same material.
  4. The wavelength of $\text{K}_\alpha$ X-ray is smaller than the wavelength of $\text{K}_\beta$ X-ray of the same material.

A magnet is brought towards a coil (i) speedly (ii) slowly then the induced e.m.f./induced charge will be respectively

(a)  More in first case / More in first case

(b)  More in first case/Equal in both case

(c)  Less in first case/More in second case

(d)  Less in first case/Equal in both case

A man wishing to get a picture of a Zebra photographed a white donkey after fitting a glass with black streaks onto the objective of his camera.
In a coaxial, straight cable, the central conductor and the outer conductor carry equal currents in opposite directions. The magnetic field is zero:
  1. Outside the cable.
  2. Inside the inner conductor.
  3. Inside the outer conductor.
  4. In between the tow conductors.

A current i ampere flows in a circular arc of wire whose radius is R, which subtend an angle 3π/2  radian at its centre. The magnetic induction B at the centre is

(a)  

(b)

(c)

(d)

The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is 54 mT. What will be its value at the centre of the loop

(a) 250 m T

(b) 150 m T

(c) 125 m T

(d) 75 m T

When a point source of light is at a distance of one metre from a photo cell, the cut off voltage is found to be V. If the same source is placed at 2 m distance from photo cell, the cut off voltage will be

(a) V 

(b) V/2

(c) V/4    

(d) V/ 

In an insulator, the energy gap between conduction band and valence band is about:

If we express the energy of a photon in KeV and the wavelength in angstroms, then energy of a photon can be calculated from the relation

(a) E = 12.4 hv

(b) E = 12.4 h/

(c) E = 12.4/

(d) E = hv

How will the image formed by a convex lens be affected if the central portion of the lens is wrapped in a black paper?