A ball of mass 500 g has 800 J of total energy at a height of 10 m. Assuming no energy loss, how much energy does it possess at a height of 5 m?
Which of the following solutions have the same concentration ?
- 4 g of NaOH in 250 mL of solution
- 0.5 mol of KCl in 250 mL of solution
- 40 g of NaOH in 250 mL of solution
- 5.61 g of KOH in 250 mL of solution
Which of the following statements are correct for cathode rays?
- Cathode rays consist of negatively charged particles.
- They are undeflected by electric and magnetic fields.
- The characteristics of cathode rays do not depend upon the material of electrodes
- The characteristics of cathode rays depend upon the nature of the gas present in the cathode ray tube.
A circular coil carrying a current I has radius R and number of turns N. If all the three, i.e. the current I, radius R and number of turns N are doubled, then, magnetic field at its centre becomes:
Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon.......................
Four statements are given regarding the image formed by a concave lens. Find the correct statement(s).
- Diminished and inverted
- Diminished and virtual
- Enlarged and virtual
- Diminished and erect
A cylindrical object with a density of 0.8 g/cm³ is partially submerged in water. If the volume of object is 0.5 m³, what is the magnitude of the buoyant force acting on it?
An object of mass 8.5 kg is kept on a level surface. On applying a force of 60 N, the object moves 12 m in the direction of the force. Calculate the quantity of work done.
Analyse the following statements and choose the correct option.
- Statement I: All isotopes of a given element show the same type of chemical behaviour.
- Statement II: The chemical properties of an atom are controlled by the number of electrons in the atom.
The gravitational force on the lunar surface is approximately 1/6 times that of the Earth. (g-10 ms-2). If an object of mass 12 kg in earth is taken to the surface of the Moon, what will be its weight at the moon's surface?
Two sound waves A and B have same amplitude and same wave pattern, but their frequencies are 60 Hz and 120 Hz respectively, then :
An object of mass 10 kg is allowed to fall to the ground from a height of 20 m. How long will it take to reach the ground? (g-10 ms-2)
A light beam passing through three mediums P. Q and R is given, by observing the figure, find out the correct statement related to the optical density of the mediums.
Two resistors, 15 Ω and 10Ω, are connected in parallel across a 6 V battery. What is the current flowing through the 15 Ω resistor?
Which of the following metals can displace hydrogen from mineral acids?
(i) Ag
(ii) Zn
(iii) Mg
(iv) Cu
Which of the following statements about the motion of an object on which unbalanced forces act is false?
If a person's near point is 25 cm (normal) but their far point is not infinity, what defect does this indicate?
താഴെ പറയുന്ന പ്രസ്താവനകളുമായി ബന്ധപ്പെട്ട നേത്ര വൈകല്യം.
അടുത്തുള്ള വസ്തുക്കളിൽ നിന്നുള്ള പ്രകാശം റെറ്റിനയ്ക്ക് പിന്നിലായി ഫോക്കസ് ചെയ്യപ്പെട്ടുന്നു.
കോൺവെക്സ് ലെൻസ് ഉപയോഗിച്ച് പരിഹരിക്കാം.