- AAmount of element present.
- BTemperature.
- CPressure.
- DNature of element.
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Which of the following statement is false
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(a) Heat produced in a conductor is proportional to its resistance |
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(b) Heat produced in a conductor is proportional to the square of the current |
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(c) Heat produced in a conductor is proportional to charge |
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(d) Heat produced in a conductor is proportional to the time for which current is passed |
A beam of monochromatic blue light of wavelength 4200Å in air travels in water (μ = 4/3). Its wavelength in water will be
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(a) 2800 Å |
(b) 5600 Å |
(c) 3150 Å |
(d) 4000 Å |
If the ammeter in the given circuit reads 2 A, the resistance R is
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(a) 1 ohm |
(b) 2 ohm |
(c) 3 ohm |
(d) 4 ohm |
Electromagnetic radiation of highest frequency is
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(a) Infrared radiations |
(b) Visible radiation |
(c) Radio waves |
(d) g-rays |
Two point charges 3 × 10–6 C and 8 × 10–6 C repel each other by a force of 6 × 10–3 N. If each of them is given an additional charge – 6 × 106 C, the force between them will be
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(a) 2.4 × 10–3 N (attractive) |
(b) 2.4 × 10–9 N (attractive) |
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(c) 1.5 × 10–3 N (repulsive) |
(d) 1.5 × 10–3 N (attractive) |
What is the time taken (in seconds) to cross a glass of thickness 4 mm and μ = 3 by light
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(a) 4 |
(b) 2 |
(c) 16 |
(d) 8 |