- APlanck
- BHallwash
- CHertz
- DEinsterin
Explanation:
Photoelectric effect was successfully explained first by Einstein.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
While tuning in a certain broadcast station with a receiver, we are actually
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(a) Varying the local oscillator frequency |
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(b) Varying the frequency of the radio signal to be picked up |
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(c) Tuning the antenna |
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(d) None of these |
$\lambda\geq\lambda_0$
$\lambda\geq2\lambda_0$
$\lambda\leq\lambda_0$
$\lambda<\frac{\lambda_ 0}{2}.$
The sensitiveness of a moving coil galvanometer can be increased by decreasing
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(a) The number of turns in the coil |
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(b) The area of the coil |
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(c) The magnetic field |
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(d) The couple per unit twist of the suspension |
Same current i = 2A is flowing in a wire frame as shown in figure. The frame is a combination of two equilateral triangles ACD and CDE of side 1m. It is placed in uniform magnetic field B = 4T acting perpendicular to the plane of frame. The magnitude of magnetic force acting on the frame is

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(a) 24 N |
(b) Zero |
(c) 16 N |
(d) 8 N |
The relation between Faraday constant (F), chemical equivalent (E) and electrochemical equivalent (Z) is
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(a) F = EZ |
(b) |
(c) |
(d) |