MCQ
Artificial radioactivity was discovered by:
- AKlaproth.
- BRontgen.
- ✓Irene Curie and Joliot.
- D$P$. Curie and $M$. Curie.
✓
Answer
Correct option: C.
Irene Curie and Joliot.
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
Light coming from a discharge tube filled with hydrogen falls on the cathode of the photoelectric cell. The work function of the surface of cathode is $4\,eV$. Which one of the following values of the anode voltage (in Volts) with respect to the cathode will likely to make the photo current zero.
→Planck constant has the same dimensions as:
Three infinitely long charge sheets are placed as shown in figure. The electric field at point $P$ is
→Which of the following pairs represent units of the same physical quantity?
The charge on 500 cc of water due to protons will be
The charges on two plates of a $10\,\mu f$ capacitor are $5\,\mu C$ and $15\,\mu C$ then the potential difference across the capacitor plates is........$V$
→Two capacitors having capacitance $C _{1}$ and $C _{2}$ respectively are connected as shown in figure. Initially, capacitor $C _{1}$ is charged to a potential difference $V$ volt by a battery. The battery is then removed and the charged capacitor $C_{1}$ is now connected to uncharged capacitor $C _{2}$ by closing the switch $S$. The amount of charge on the capacitor $C _{2}$, after equilibrium is
→A heater coil is cut into two parts of equal length and one of them is used in the heater. The ratio of the heat produced by this half coil to that by the original coil is
If a rod has resistance 4 W and if rod is turned as half cycle then the resistance along diameter
A parallel plate condenser with oil between the plates (dielectric constant of oil K = 2) has a capacitance C. If the oil is removed, then capacitance of the capacitor becomes