Which simple, A or B shown in Fig. EP 13.13 has shorter mean life?

Three identical bar magnets are rivetted together at centre in the same plane as shown in Fig. EP 5.17 (a). This system is placed at rest in a slowly varying magnetic field. It is found that the system of magnets does not show any motion. The north-south poles of one magnet is shown in the Fig. Determine the poles of the remaining two.

The variation of decay rate of two radioactive samples A and B with is shown in Fig. Ep.13.2.which of the following statements are true?

Study the circuits (a) and (b) shown in Fig. EP 7.16 and answer the following questions. Under which conditions would the rms currents in the two circuits be the same?

Study the circuits (a) and (b) shown in Fig. EP 7.16 and answer the following questions. Can the rms current in circuit (b) in larger than in (a)?

Write the truth table for the circuit shown in Fig. EP 14.29. Name the gate that the circuit resembles.

There are two coils A and B shown in Fig. EP. 6.4. A current start flowing in B as shown, when A is moved towards B and storps when A stops moving. The curent is A is counterclockwise. B is kept stationary when A moves. We can infer that

A ray of light is incident at an angle of 60^@ on the first face of a prism of an angle 30^@ .The ray emergingn out of the prism makes an angle of 30^@ with the incident ray as shown in Fig.3.13. . calculate the refractive index of the material of the prism.

Name the type of a diode whose characterstics are shown in Fig. EP 14.23 (a) and Fig. EP 14.23(b).

A child playing with building blocks, which are of the shape of cubes, has built a structure as shown in Fig. 13.25. If the edge of each cube is 3 cm, find the volume of the structure built by the child.

What does the points P and Q in Fig. EP 14.23 (b) represent?