- AVoltage.
- BCurrent.
- CResistance.
- DPower.
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Assertion : When charges are shared between any two bodies, no charge is really lost, but some loss of energy does occur.
Reason : Some energy disappears in the form of heat, sparking etc.
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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. |
The kinetic energy of an electron is 5 eV. Calculate the de-Broglie wavelength associated with it (h = 6.6 × 10–34 Js, me = 9.1 × 10–31 kg)
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(a) 5.47 Å |
(b) 10.9 Å |
(c) 2.7 Å |
(d) None of these |
Quantity that remains unchanged in a transformer is
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(a) Voltage |
(b) Current |
(c) Frequency |
(d) None of the above |
The wavelength of X-rays is of the order of
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(a) Centimetre |
(b) Micron (10-6 m) |
(c) Angstrom (10-10 m) |
(d) Metre |
Some equipotential surfaces of the magnetic scalar potential are shown in the figure. Magnetic field at a point in the region is
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(a) |
(b) 2 |
(c) 0.5 |
(d) None of these |
In a biprism experiment, by using light of wavelength 5000 Å, 5 mm wide fringes are obtained on a screen 1.0 m away from the coherent sources. The separation between the two coherent sources is
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(a) 1.0 mm |
(b) 0.1 mm |
(c) 0.05 mm |
(d) 0.01 mm |
$\frac{\text{W}}{2}$
$2^{\frac{1}{3}}$ W at the planet.