MCQ
Carbon has __________ isotopes.
- A1 (one)
- B2 (two)
- C3 (three)
- D4 (four)
✓
Answer
- 3 (three)
Explanation:
Carbon has three isotopes $12\text{C}\\ \ 6$, $13\text{C}\\ \ 6$ and $14\text{C}\\ \ 6$
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
According to classical theory, path of electron in Rutherford model :
Complete the following nuclear reaction. \[{ }_0^1 n+{ }_{92}^{235} U-{ }_{92}^{236} U---+{ }_{41}^{99} Nb+--\]
Which theory is confirmed by the Davisson – Germer experiment?
Figure given below shows a beam of light converging at point P. When a convex lens of focal length 16 cm is introduced in the path of the beam at a place O shown by dotted line such that OP becomes the axis of the lens, the beam converges at a distance x from the lens. The value x will be equal to
|
(a) 12 cm |
(b) 24 cm |
(c) 36 cm |
(d) 48 cm |
In the diagram, the input is across the terminals A and C and the output is across the terminals B and D, then the output is
|
(a) Zero |
(b) Same as input |
(c) Full wave rectifier |
(d) Half wave rectifier |
In the circuit, the potential difference across PQ will be nearest to
|
(a) 9.6 V |
(b) 6.6 V |
(c) 4.8 V |
(d) 3.2 V |
Two particles X and Y having equal charge, after being accelerated through the same potential difference enter a region of uniform magnetic field and describe circular paths of radii R1 and R2 respectively. The ratio of the mass of X to that of Y is:
→- $\Big(\frac{\text{R}_1}{\text{R}_2}\Big)^{\frac{1}{2}}$
- $\frac{\text{R}_1}{\text{R}_2}$
- $\Big(\frac{\text{R}_1}{\text{R}_2}\Big)^2$
- $\text{R}_1\text{R}_2.$
Nature of electromagnetic waves is:
In the given figure, when galvanometer shows no deflection, the current (in ampere) flowing through 5Ω resistance will be
|
(a) 0.5 |
(b) 0.6 |
(c) 0.9 |
(d) 1.5 |
Two parallel, long wires carry currents i1 and i2 with i1 > i2. When the currents are in the same direction, the magnetic field at a point midway between the wires is $10 \mu\text{T}.$ If the direction of i2 is reversed, the field becomes $30 \mu\text{T}.$ The ratio $\frac{\text{i}_1}{\text{i}_2}$ is:
→