MCQ
In the attached figure, the value of equivalence between points A and B will be:
- ✓$6 \mu F$
- B$4 \mu F$
- C$\frac{6}{11} \mu F$
- D$\frac{11}{5} \mu F$
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Assertion : Zener diode works on a principle of breakdown voltage.
Reason : Current increases suddenly after breakdown voltage.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
An X-ray has a wavelength of 0.010 Å. Its momentum is
| (a) 2.126 × 10–23 kg-m/sec | (b) 6.626 × 10-22 kg-m/sec |
| (c) 3.456 × 20–25 kg-m/sec | (d) 3.313 × 10–22 kg-m/sec |
If a 2 kW boiler is used everyday for 1 hour, then electrical energy consumed by boiler in thirty days is
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(a) 15 unit |
(b) 60 unit |
(c) 120 unit |
(d) 240 unit |
If cathode rays are projected at right angles to a magnetic field, their trajectory is
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(a) Ellipse |
(b) Circle |
(c) Parabola |
(d) None of these |