Periodic time, T = 0.5 s,
F = $\frac{1}{T}$ = $\frac{1}{0.5}$ = 2 Hz
johnmulu answered the question on April 19, 2017 at 13:08
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Figure 4 shows the displacement - time graph for a certain wave
Determine the frequency of the wave
Date posted: April 19, 2017. Answers (1)
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State the type of mechanical wave generated by the set-up and mark alongside the coil, the length corresponding to the wavelength, wavelength of the wave.
Date posted: April 19, 2017. Answers (1)
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Date posted: April 19, 2017. Answers (1)
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ii) Period
iii) frequency
iv) Wavelength
Date posted: April 19, 2017. Answers (1)
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I. Wavelength of the wave
II. Amplitude of the wave
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I. frequency of the wave
II. Speed of the wave
Date posted: April 19, 2017. Answers (1)
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Date posted: April 19, 2017. Answers (1)
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State with a reason whether the experiment was done within the elastic limit of the spring.
Date posted: April 19, 2017. Answers (1)
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Determine the maximum weight that can be measured using the spring.
Date posted: April 19, 2017. Answers (1)
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The three springs shown in Figure 5 are identical and have negligible weight. The extension produced on the system of springs is 20 cm.
Determine the constant of each spring
Date posted: April 19, 2017. Answers (1)
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The graph in Fig. 7 represent the relations between extension, e and mass, m added on two springs x and y.
Given that the two springs are made of same materials, give a reason why the graphs are different
Date posted: April 19, 2017. Answers (1)
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Determine the total extension caused by the 90 N weight. (Ignore the weight of the springs and connecting rods)
Date posted: April 19, 2017. Answers (1)
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Date posted: April 19, 2017. Answers (1)
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Figure 7 shows a simple electric bell circuit
i) Name the parts labeled:
I) D
II) E
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I) The hammer hits the gong.
II) The hammer hits the gong repeatedly
Date posted: April 19, 2017. Answers (1)
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Figure 7 shows two similar coils P and Q around the end L and M of a piece of soft iron. A steady current passes through the coils
State the polarity of the resulting magnet at point L
Date posted: April 19, 2017. Answers (1)
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Figure 5, shows a motor connected to a magnetic switch called a relay operated by an ordinary switch S1. Use the information in the figure to answer questions a) and b)
a) Explain how the relay switches on the motor when S1 is closed
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Date posted: April 19, 2017. Answers (1)
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Date posted: April 19, 2017. Answers (1)
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Date posted: April 19, 2017. Answers (1)
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Figure 8 shows two parallel thick copper conductors connected to a d.c. power supply. A rider made from a thin copper wire is placed on the conductors
State and explain what is observed on the rider when the switch is closed.
Date posted: April 19, 2017. Answers (1)
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Figure 2 shows the circuit of a simple telephone receiver. When the telephone is lifted a steady current flows through the solenoids. When a person speaks into the microphone on the other side, a varying current flows. These two currents are shown in Figure 2 (b)
i) State the reason why the solenoids are wound in opposite directions around the soft-iron core pieces as shown.
ii) Explain how the speech current from the microphone is converted into sound in the direction receiver.
iii) State and explain the effect of replacing the soft iron core pieces with steel core pieces
Date posted: April 19, 2017. Answers (1)
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Figure 16 shows a wire XY at right angles to a magnetic field. XY is part of circuit containing a galvanometer.
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Date posted: April 19, 2017. Answers (1)