- AEmitter, base and collector.
- BCollector, base and emitter.
- CBase, emitter and collector.
- DBase, collector and emitter.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A charged particle moves in a uniform magnetic field. The velocity of the particle at some instant makes an acute angle with the magnetic field. The path of the particle will be
|
(a) A straight line |
(b) A circle |
|
(c) A helix with uniform pitch |
(d) A helix with non-uniform pitch |
A beam of parallel rays is brought to a focus by a plano-convex lens. A thin concave lens of the same focal length is joined to the first lens. The effect of this is
|
(a) The focal point shifts away from the lens by a small distance |
|
(b) The focus remains undisturbed |
|
(c) The focus shifts to infinity |
|
(d) The focal point shifts towards the lens by a small distance |
What is shape of magnet in moving coil galvanometer to make the radial magnetic field
|
(a) Concave |
(b) Horse shoe magnet |
(c) Convex |
(d) None of these |
A steady current i flows in a small square loop of wire of side L in a horizontal plane. The loop is now folded about its middle such that half of it lies in a vertical plane. Let and
respectively denote the magnetic moments due to the current loop before and after folding. Then
|
(a) |
(b) |
|
(c) |
(d) |
For the given circuit of PN-junction diode, which of the following statement is correct

|
(a) In forward biasing the voltage across R is V |
|
(b) In forward biasing the voltage across R is 2V |
|
(c) In reverse biasing the voltage across R is V |
|
(d) In reverse biasing the voltage across R is 2V |
Out of the following statements which is not correct
|
(a) When unpolarised light passes through a Nicol's prism, the emergent light is elliptically polarised |
|
(b) Nicol's prism works on the principle of double refraction and total internal reflection |
|
(c) Nicol's prism can be used to produce and analyse polarised light |
|
(d) Calcite and Quartz are both doubly refracting crystals |