A storage cell is charged by 5 amp D.C. for 18 hours. Its strength after charging will be
|
(a) 18 AH |
(b) 5 AH |
(c) 90 AH |
(d) 15 AH |
A storage cell is charged by 5 amp D.C. for 18 hours. Its strength after charging will be
|
(a) 18 AH |
(b) 5 AH |
(c) 90 AH |
(d) 15 AH |
(c) 90 AH
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Consider the following statements A to B and identify the correct answer
A. Polarised light can be used to study the helical surface of nucleic acids.
B. Optics axis is a direction and not any particular line in the crystal
|
(a) A and B are correct |
(b) A and B are wrong |
|
(c) A is correct but B is wrong |
(d) A is wrong but B is correct |
A capacitor with air as the dielectric is charged to a potential of 100 volts. If the space between the plates is now filled with a dielectric of dielectric constant 10, the potential difference between the plates will be
|
(a) 1000 volts |
(b) 100 volts |
(c) 10 volts |
(d) Zero |
Emf is most closely related to
|
(a) Mechanical force |
(b) Potential difference |
|
(c) Electric field |
(d) Magnetic field |
Dark lines on solar spectrum are due to
|
(a) Lack of certain elements |
|
(b) Black body radiation |
|
(c) Absorption of certain wavelengths by outer layers |
|
(d) Scattering |
Assertion : Current is passed through a metallic wire, heating it red. When cold water is poured on half of its portion, then rest of the half portion become more hot.
Reason : Resistances decreases due to decrease in temperature and so current through wire increases.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
Two parallel beams of electrons moving in the same direction produce a mutual force
|
(a) Of attraction in plane of paper |
|
(b) Of repulsion in plane of paper |
|
(c) Upwards perpendicular to plane of paper |
|
(d) Downwards perpendicular to plane of paper |
If the mass number of an atom is A = 40 and its electron configuration is
, the number of neutrons and protons in its nucleus will be
| (a) 22, 18 | (b) 18, 22 |
(c) 20, 20 |
(d) 18, 18 |