Question
What is increased in step-down transformer
|
(a) Voltage |
(b) Current |
(c) Power |
(d) Current density |
✓
Answer
(b) Current
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
When a dielectric is introduced between the plates of a condenser, the capacity of condenser:
A square loop of side 5 cm enters a magnetic field with 1 cms-1. The front edge enters the magnetic field at t = 0 then which graph best depicts emf
(a)
|
(b)
|
(c)
|
(d)
|
Thermal neutrons are those which
|
(a) Are at very high temperature |
|
(b) Move with high velocities |
|
(c) Have kinetic energies similar to those of surrounding molecules |
|
(d) Are at rest |
Which of the following curves may represent the speed of the electron in a hydrogen atom as a function of the principal quantum number n?
A wire has resistance 12 Ω. It is bent in the form of a circle. The effective resistance between the two points on any diameter is equal to
|
(a) 12 Ω |
(b) 6 Ω |
(c) 3 Ω |
(d) 24 Ω |
Which one of the following gives the resultant capacitor when capacitors are joined in series?
When a charged particles moves in a uniform magnetic field in a direction perpendicular to the field, then the path of the particle will be:
Kinetic energy with which the electrons are emitted from the metal surface due to photoelectric effect is
|
(a) Independent of the intensity of illumination |
|
(b) Independent of the frequency of light |
|
(c) Inversely proportional to the intensity of illumination |
|
(d) Directly proportional to the intensity of illumination |
Half life of a radio-active substance is 20 minutes. The time between 20% and 80% decay will be
|
(a) 20 minutes |
(b) 40 minutes |
(c) 30 minutes |
(d) 25 minutes |
The energy contained in a small volume through which an electromagnetic wave is passing oscillates with:
- Zero frequency.
- The frequency of the wave.
- Half the frequency of the wave.
- Double the frequency of the wave.