MCQ
Magnetic needle can remain safe in:
- ✓iron box
- Bwooden box
- Cmetal box
- Dnone of these
✓
Answer
Correct option: A.
iron box
(a)iron box
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
An electron is travelling along the X-direction. It encounters a magnetic field in the Y-direction. Its subsequent motion will be:
Which of the following quantities related to a lens depend on the wavelength or wavelengths of the incident light?
The speed at which the current travels in a conductor, is nearly.
The adjoining figure shows an AC circuit with resistance R, inductance L and source voltage Vs. Then.
Which of the following transition will have highest emission wavelength
|
(a) n = 2 to n = 1 |
(b) n = 1 to n = 2 |
(c) n = 2 to n= 5 |
(d) n = 5 to n = 2 |
Two cells of equal e.m.f. and of internal resistances 
and 
are connected in series. On connecting this combination to an external resistance R, it is observed that the potential difference across the first cell becomes zero. The value of R will be
|
(a) |
(b) |
(c) |
(d) |
An Aluminium (Al) rod with area of cross-section 4 × 10–6m2 has a current of 5 ampere. Flowing through it. Find the drift velocity of electron in the rod. Density of Al = 2.7 × 103kg/m3 and Atomic wt. = 27. Assume that each Al atom provides one electron:
The output of a step-down transformer is measured to be 24V when connected to a 12 watt light bulb. The value of the peak current is:
The capacitance between the points A and B in the given circuit will be
|
(a) 1 μF |
(b) 2 μF |
(c) 3 μF |
(d) 4 μF |
The transistor are usually made of: