Practice questions
88551 published questions with worked solutions.
- A parallel plate capacitor has a capacitance C = 200 pF. It is connected to 230 V ac supply with an angular frequency 300 rad/s....
- In series LCR circuit, the capacitance is changed from C to 4C. To keep the resonance frequency unchanged, the new inductance...
- If R is the radius of the earth and the acceleration due to gravity on the surface of earth is g = π^2 m/s^2, then the length of...
- A monochromatic light of wavelength 6000 Å is incident on the single slit of width 0.01 mm. If the diffraction pattern is formed...
- 10 divisions on the main scale of a Vernier caliper coincide with 11 divisions on the Vernier scale. If each division on the main...
- The radius (r), length ( ) and resistance (R) of a metal wire was measured in the laboratory as r = (0.35 ± 0.05) cm, R = (100 ±...
- A rectangular loop of sides 12 cm and 5 cm, with its sides parallel to the x-axis and y-axis respectively, moves with a velocity...
- Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle θ with each other. When...
- A particle is moving in one dimension (along x-axis) under the action of a variable force. It's initial position was 16 m right...
- The current in a conductor is expressed as I = 3t^2 + 4t^3, where I is in Ampere and t is in second. The amount of electric...
- The distance between object and its 3 times magnified virtual image as produced by a convex lens is 20 cm. The focal length of...
- The identical spheres each of mass 2M are placed at the corners of a right angled triangle with mutually perpendicular sides...
- A tuning fork resonates with a sonometer wire of length 1 m stretched with a tension of 6 N. When the tension in the wire is...
- The radius of a nucleus of mass number 64 is 4.8 fermi. Then the mass number of another nucleus having radius of 4 fermi is 1000...
- A regular polygon of 6 sides is formed by bending a wire of length 4π meter. If an electric current of 4 3 A is flowing through...
- Given below are two statements: one is labeled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): PH_3 has...
- Match List - I with List - II. List-I: (A) CH_3(CH_2)_5–C(=O)–OC_2H_5 → CH_3(CH_2)_5CHO (B) C_6H_5COC_6H_5 → C_6H_5CH_2C_6H_5 (C)...
- We have three aqueous solutions of NaCl labeled as 'A', 'B' and 'C' with concentration 0.1 M, 0.01 M and 0.001 M, respectively....
- Which of the following reactions are disproportionation reactions? (A) Cu^+ → Cu^ 2+ + Cu (B) 3MnO_4^ 2- + 4H^+ → 2MnO_4^- +...
- Given below are two statements: Statement (I): The NH_2 group in Aniline is ortho and para directing and a powerful activating...