Practice questions
88551 published questions with worked solutions.
- Two identical conducting spheres P and S with charge Q on each, repel each other with a force 16N. A third identical uncharged...
- In a coil, the current changes from −2 A to +2A in 0.2 s and induces an emf of 0.1 V. The self inductance of the coil is:
- For the thin convex lens, the radii of curvature are at 15 cm and 30 cm respectively. The focal length of the lens is 20 cm. The...
- A body of weight 200 N is suspended from a tree branch through a chain of mass 10 kg. The branch pulls the chain by a force equal...
- When UV light of wavelength 300 nm is incident on the metal surface having work function 2.13 eV, electron emission takes place....
- When kinetic energy of a body becomes 36 times of its original value, the percentage increase in the momentum of the body will be:
- Pressure inside a soap bubble is greater than the pressure outside by an amount: (given: R = Radius of bubble, S = Surface...
- In a vernier calliper, when both jaws touch each other, zero of the vernier scale shifts towards left and its 4th division...
- Given below are two statements: Statement (I): Dimensions of specific heat is [L²T⁻²K⁻¹] Statement (II): Dimensions of gas...
- A body projected vertically upwards with a certain speed from the top of a tower reaches the ground in t₁. If it is projected...
- In Franck-Hertz experiment, the first dip in the current-voltage graph for hydrogen is observed at 10.2 V. The wavelength of...
- For a given series LCR circuit it is found that maximum current is drawn when value of variable capacitance is 2.5 nF. If...
- A particle moves in a straight line so that its displacement x at any time t is given by x² = 1 + t². Its acceleration at any...
- Three balls of masses 2kg, 4kg and 6kg respectively are arranged at centre of the edges of an equilateral triangle of side 2 m....
- A coil having 100 turns, area of 5 × 10⁻³ m², carrying current of 1 mA is placed in uniform magnetic field of 0.20 T such a way...
- Two coherent monochromatic light beams of intensities I and 4I are superimposed. The difference between maximum and minimum...
- Two open organ pipes of length 60 cm and 90 cm resonate at 6th and 5th harmonics respectively. The difference of frequencies for...
- Molality (m) of 3 M aqueous solution of NaCl is: (Given: Density of solution = 1.25 g mL⁻¹, Molar mass in g mol⁻¹: Na-23, Cl-35.5)
- The incorrect statements regarding enzymes are: (A) Enzymes are biocatalysts. (B) Enzymes are non-specific and can catalyse...
- During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in...