MCQ
The size of the nucleus is approximately :
- A$10^{-10}$ meters
- ✓$10^{-15}$ meters
- C$10^{-5}$ meter
- D$10^{-18}$ meters
✓
Answer
Correct option: B.
$10^{-15}$ meters
(b) - $10^{-15}$ meters
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 particle A has charge +q and a particle B has charge +4q with each of them having the same mass m. When allowed to fall from rest through the same electric potential difference, the ratio of their speed 
will become
|
(a) 2 : 1 |
(b) 1 : 2 |
(c) 1 : 4 |
(d) 4 : 1 |
The length of a wire required to manufacture a solenoid of length l and self-induction L is (cross-sectional area is negligible)
Two coherent sources of different intensities send waves which interfere. The ratio of maximum intensity to the minimum intensity is 25. The intensities of the sources are in the ratio:
- 25 : 1
- 5 : 1
- 9 : 4
- 625 : 1
The charge on electron was discovered by
|
(a) J.J. Thomson |
(b) Neil Bohr |
(c) Millikan |
(d) Chadwick |
A triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of the loop is in the direction of B. The torque on the loop is
|
(a) Zero |
(b) IBl |
(c) |
(d) |
The radius of curvature of the curved surface of a plano-convex lens is 20cm. If the refractive index of the material of the lens be 1.5, it will.
Two particles A and B have a phase difference of $\pi$ when a sine wave passes through the region.
→- A oscillates at half the frequency of B.
- A and B move in opposite directions.
- A and B must be separated by half of the wavelength.
- The displacements at A and B have equal magnitudes.
The wave theory in its original form was first postulated by:
The electric potential V is given as a function of distance x (metre) by 
)volt. Value of electric field at x = 1 is
|
(a) 20 V/m |
(b) 6 V/m |
(c) 11 V/m |
(d) -23 V/m |
In a PNP transistor the base is the N-region. Its width relative to the P-region is
|
(a) Smaller |
(b) Larger |
(c) Same |
(d) Not related |