Dual Nature of Radiation and Matter — Physics STD 12 Science — Question

Radioactivity is(a) Irreversible process(b) Self disintegration process(c) Spontaneous process(d) All of the above

For the myopic eye, the defect is cured by 
(a) Convex lens(b) Concave lens (c) Cylindrical lens(d) Toric lens 

Curies law can be written as

A uniform wire of 16 Ω  is made into the form of a square. Two opposite corners of the square are connected by a wire of resistance 16 Ω. The effective resistance between the other two opposite corners is(a) 32 Ω  (b) 20 Ω(c) 8 Ω(d) 4 Ω

What is immaterial for an electric fuse wire (a) Specific resistance of the wire(b) Radius of the wire(c) Length of the wire(d) Current flowing through the wire

On cutting a solenoid in half, the field lines remain ...A... emerging from one face of the solenoid and entering into the other face.
Here, A refers to.

When a resistance of 2ohm is connected across the terminals of a cell, the current is 0.5 amperes. When the resistance is increased to 5 ohm, the current is 0.25 amperes. The internal resistance of the cell is(a) 0.5 ohm (b) 1.0 ohm(c) 1.5 ohm (d) 2.0 ohm

Which is the lightest element in the universe?

An electron enters a region where magnetic (B) and electric (E) fields are mutually perpendicular to one another, then(a) It will always move in the direction of B(b) It will always move in the direction of E(c) It always possess circular motion(d) It can go undeflected also