MCQ
The power factor at the time of resonance is __________ .
- A$0$
- B$\infty$
- ✓1
- D$0.5$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
An LC resonant circuit contains a 400 pF capacitor and a 100 mH inductor. It is set into oscillation coupled to an antenna. The wavelength of the radiated electromagnetic waves is
|
(a) 377 mm |
(b) 377 metre |
(c) 377 cm |
(d) 3.77 cm |
Assertion : The earth’s magnetic field does not affect the working of a moving coil galvanometer.
Reason : Earth’s magnetic field is very weak.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
Which of the following statements indicates that light waves are transverse
|
(a) Light waves can travel in vacuum |
(b) Light waves show interference |
|
(c) Light waves can be polarized |
(d) Light waves can be diffracted |
For a given triode μ = 20. The load resistance is 1.5 times the anode resistance. The maximum gain will be
|
(a) 16 |
(b) 12 |
(c) 10 |
(d) None of the above |
If a proton is projected in a direction perpendicular to a uniform magnetic field with velocity v and an electron is projected along the lines of force, what will happen to proton and electron
|
(a) The electron will travel along a circle with constant speed and the proton will move along a straight line |
|
(b) Proton will move in a circle with constant speed and there will be no effect on the motion of electron |
|
(c) There will not be any effect on the motion of electron and proton |
|
(d) The electron and proton both will follow the path of a parabola |