MCQ
Solar energy is mainly caused due to
  • A
    Fission of uranium present in the sun
  • Fusion of protons during synthesis of heavier elements
  • C
    Gravitational contraction
  • D
    Burning of hydrogen in the oxygen

Answer

Correct option: B.
Fusion of protons during synthesis of heavier elements
b
(b) As result of fusion, enormous amount of heat is liberated which is the main cause of source of solar energy.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The inductance of a solenoid $0.5 m$ long of cross$-$sectional area $20\ cm^2$ and with $500$ turns is
In sum and difference method in vibration magnetometer, the time period is more if
Two concentric circular coils of ten turns each are situated in the same plane. Their radii are 20 and 40 cm and they carry respectively 0.2 and 0.3 ampere current in opposite direction. The magnetic field in weber/m$^2$ at the centre is
To obtain a $P-$type germanium semiconductor, it must be doped with
The Young's experiment is performed with the lights of blue (λ = 4360 Å) and green colour (λ = 5460 Å), If the distance of the 4th fringe from the centre is x, then
The binding energy of the innermost electron in tungsten is 40 keV. To produce characteristic X-rays using a tungsten target in an X-rays tube the potential difference V between the cathode and the anti-cathode should be
The expression for the capacity of the capacitor formed by compound dielectric placed between the plates of a parallel plate capacitor as shown in figure, will be (area of plate $ = A$)
If $l_1, l_2, l_3$ are the lengths of the emitter, base and collector of a transistor then
Two identical parallel plate capacitors are connected in series to a battery of 100 V. A dielectric slab of dielectric constant 4.0 is inserted between the plates of second capacitor. The potential difference across the capacitors will now be respectively
An electric motor operating on a 60 V dc supply draws a current of 10 A. If the efficiency of the motor is 50%, the resistance of its winding is