Lab 13 - standing waves on a string

Question 2 Mechanical waves are classified according to how they move. their size. their shape. their source.

Question 4 This is realted to #6 on the Waves Introduction Worksheet portion of the document. Graph A Graph B Displaament vs. Position for Random Wiave Displacementvs. Time for Randem Wave -1 -2 -4 -5 Position m) Time (s) What is the frequency of the wave represented by these two graphs? Your answer: 0.25 Hz 0.5 Hz 2 Hz 4 Hz Diaplacement (m) w nds

A wire is shown in the figure below that is moving in the presence of a magnetic field. With the information given in the figure, determine the magnitude and 45° X. direction of the induced voltage in the wire. XV = 10 m/s 1 = 0.25 m Activate Windows B = 0.2 T, into the page Go to Settings to activate Wind XE X

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Topic: Magnetic Field along the Axis of Circular Coil Carrying Current Question:   What will be the Magnetic field value at the center of a current-carrying coil?

A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for when the microphone records the sound. The microphone changes the wave from mechanical wave to an electromagnetic wave. The recorded waves are electromagnetic waves. The microphone does not change the wave type. The recorded waves are mechanical waves. The frequency or amplitude of the waves will not change in the microphone. The frequency or amplitude of the waves will change in the microphone. ✓ The microphone changes the wave from an electromagnetic wave to a mechanical wave. >

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Q2. String waves are (a) longitudinal (b) both longitudinal and transverse (c) transverse (d) none of the choices

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Behavior of Magnetostrictive material

4. Induced current occurs when the magnetic flux through a conducting loop changes. This can happen when a) the magnetic field magnitude changes, b) the magnetic field direction changes, c) the orientation of the loop changes with respect to the magnetic field, or d) if the area of the loop changes. Draw a picture of a situation where each of the above things occurs.

Explain the picture.

10: The value of B at H-0 in a Hysteresis curve is called A) Remanence. B) Coercivity. C) Magnetization. D) Porosity 11: Ferrites are a sub-group of A) Non-magnetic materials, B) Ferro-magnetic materials, C) Paramagnetic materials, D) Ferri-magnetic materials. . 12: Find the true statement. A) Most of the substances show ferromagnetism, B) The magnetic susceptibility of diamagnetic substances are temperature independent, C) Water is paramagnetic in nature, D) Typical domain size of a ferromagnetic material is I nm. 13: Mutual inductance between two magnetically coupled coils depends on A) Permeability of the core material, B) Number of turns of the coils C) Cross sectional area of their common core, D) All of the above. 14: Which of the following circuit elements will oppose the change in circuit current? A)Capacitance. B) Inductance, C) Resistance, D) All of the above. 15: If the current in one coil is steady, what happens to the mutual inductance? A) Zero, B) Infinity. C) Doubles, D)…

In a Curie-type paramagnet, all the ions with magnetic moments contribute to the total susceptibility, but in a metal, only very few of the free electrons contribute to Pauli paramagnetism. Why?

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Through a conducting loop, the magnetic flux changes with time as 4,=6²- 18r' Tm². When does the induced emf reach to its maximum value in magnitude between t=0 and t=2 s? 1 - O A) 1 s B) 0 C) 1.5 s O D) 2 s O E) 0.5 s

electromagnetic feild and wave

Describe the physical significance of having equipotential map in the study of electricity

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Q3 a)- Draw a developed diagram of simple wave winding having 9 slots, 4 poles, 9 segments, 18 conductors and 9 coils (27)

What should be the conductivity of a perfect dielectric?

4. Compare the two types of energies Tidal and wave in brief?

What would be the inducesd voltage for a conductor moving at a speed of 25 km/h and having a length of 1 m being passed through a magnetic field with flux density of 0.6 T? 6.25 V 1.74 V 6250 V 1.736 mV none of the above

Electromagnetic field

Determine the magnetic field intensity, H at the centre of square current element. The length of each side is 2m and the current I = 1Amp.

Please continue. If a conducting bar of length I moves through a magnetic field with a speed v so that B is perpendicular to the bar (Figure), the emf induced in the bar. This emf is called x x x x x x x x R x x x x and its magnitude is equal to x x x x Ax