MCQ
$10\ cm$ is a wavelength corresponding to the spectrum of:
- AInfrared rays
- BUltraviolet rays
- ✓Microwaves
- D$X-$rays
✓
Answer
Correct option: C.
Microwaves
Microwaves have wavelength around $10\ cm.$
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
To light, a $50\,W , 100\,V$ lamp is connected, in series with a capacitor of capacitance $\frac{50}{\pi \sqrt{ x }} \mu F$, with $200 V , 50 Hz AC$ source. The value of $x$ will be........
→A watch glass containing some powdered substance is placed between the pole pieces of a magnet. Deep concavity is observed at the centre. The substance in the watch glass is:
A cell of e.m.f. E is connected with an external resistance R, then p.d. across cell is V. The internal resistance of cell will be
The expression of $Y$ in the above circuit is:
→In an $AC$ generator, a coil with $N$ turns, all of the same area $A$ and total resistance $R$, rotates with frequency $\omega$ in a magnetic field $B$. The maximum value of emf generated in the coil is
→Avalanche breakdown in a $PN$ junction diode is due to
→If the strength of the magnetic field produced $10\,cm$ away from a infinitely long straight conductor is ${10^{ - 5}}\,Weber/{m^2}$, the value of the current flowing in the conductor will be........$ampere$
→In an a.c. curent the $e.m.f$ $(\varepsilon)$ and the current $(i)$ at any instant are given respectively by $E=E_o sin\,\,\omega t$ ,$i=I_o sin$$\left( {\omega t - \phi } \right)$ The average power in the circuit over one cycle of $a.c.$ is
→If magnetic lines of force are drawn by keeping magnet vertical, then number of neutral points will be
A uniform wire of length $l$ and radius $r$ has a resistance of $100\, \Omega $. It is recast into a wire of radius $\frac{r}{2}$. The resistance of new wire will be ............... $\Omega$
→