A galvanometer can be converted into an ammeter by connecting
|
(a) Low resistance in series |
(b) High resistance in parallel |
|
(c) Low resistance in parallel |
(d) High resistance in series |
(c) Low resistance in parallel
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
During a negative beta decay
|
(a) An atomic electron is ejected |
|
(b) An electron which is already present within the nucleus is ejected |
|
(c) A neutron in the nucleus decays emitting an electron |
|
(d) A part of the binding energy is converted into electron |
The energy required to knock out the electron in the third orbit of a hydrogen atom is equal to
|
(a) 13.6 eV |
(b) + |
(c) - |
(d) - |
A source of e.m.f. E = 15 V and having negligible internal resistance is connected to a variable resistance so that the current in the circuit increases with time as i = 1.2 t + 3. Then, the total charge that will flow in first five second will be
|
(a) 10 C |
(b) 20 C |
(c) 30 C |
(d) 40 C |
A rocket is going towards moon with a speed v. The astronaut in the rocket sends signals of frequency v towards the moon and receives them back on reflection from the moon. What will be the frequency of the signal received by the astronaut (Take v << c)
|
(a) |
(b) |
(c) |
(d) |
A charged water drop whose radius is 0.1 μm is in equilibrium in an electric field. If charge on it is equal to charge of an electron, then intensity of electric field will be (g = 10
|
(a) 1.61 N/C |
(b) 26.2 N/C |
(c) 262 N/C |
(d) 1610 N/C |
The energy band gap of Si is
|
(a) 0.70 eV |
(b) 1.1 eV |
|
(c) Between 0.70 eV to 1.1 eV |
(d) 5 eV |
