Magnetism And Matter — Physics STD 12 Science — Question

Which of the following cannot cause fission in a heavy nucleus

(a) a-particle

(b) Proton

(c) Deutron

(d) Laser rays

A body is suspended from a spring balance kept in a satellite. The reading of the balance is W₁ when the satellite goes in an orbit of radius R and is W₂ when it goes in an orbit of radius 2R.

1. W₁ = W₂
2. W₁ < W₂
3. W₁ > W₂
4. W₁ ≠ W₂

In a copper voltameter, mass deposited in 6 minutes is m gram. If the current-time graph for the voltameter is as shown here, then the E.C.E of the copper is

(a) m / 5

(b) m / 300

(c) 5 m

(d) m / 18000

Two equal positive charges are kept at points A and B. The electric potential at the points between A and B (excluding these points) is studied while moving from A to B. The potential.

1. Continuously increases.
2. Continuously decreases.
3. Increases then decreases.
4. Decreases then increases.

In an AC circuit containing only capacitance, the current:

An electric field can deflect:

Electric field intensity at a point in between two parallel sheets with like charges of same surface charge densities (σ)  is

(a)

(b)

(c) Zero

(d)

When X  rays pass through a strong uniform magnetic field, Then they

(a) Do not get deflected at all

(b) Get deflected in the direction of the field

(c) Get deflected in the direction opposite to the field

(d) Get deflected in the direction perpendicular to the field