Wavelength = 4 cm (from the graph)
Velocity = 5 x 0.04
= 0.2 ms-1
johnmulu answered the question on April 19, 2017 at 12:52
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Figure 5 shows the displacement time graph of a wave travelling at 200 cm/s.
Determine for the wave, the
i) Amplitude
ii) Period
iii) frequency
iv) Wavelength
Date posted: April 19, 2017. Answers (1)
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Figure 3 shows a transverse wave traveling along x-axis
i) Determine the:
I. Wavelength of the wave
II. Amplitude of the wave
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I. frequency of the wave
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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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(Solved)
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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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(Solved)
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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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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.
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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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(Solved)
Figure 7 shows a simple electric bell circuit
i) Name the parts labeled:
I) D
II) E
ii) When the switch is closed, the hammer hits the gong repeatedly. Explain why?
I) The hammer hits the gong.
II) The hammer hits the gong repeatedly
Date posted: April 19, 2017. Answers (1)
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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
b) State with a reason the effect on the motor, if the iron core is replaced with a steel core and switch S1 is put on and then off.
Date posted: April 19, 2017. Answers (1)
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Figure 3 shows a flat spring made of iron clamped horizontally on the bench over a solenoid.
When the switch is closed, the spring vibrates. Explain this observation.
Date posted: April 19, 2017. Answers (1)
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State two ways of increasing the force on the coil
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)
- Figure 2 shows the circuit of a simple telephone receiver(Solved)
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)
- Figure 16 shows a wire XY at right angles to a magnetic field. XY is part of circuit containing a galvanometer.(Solved)
Figure 16 shows a wire XY at right angles to a magnetic field. XY is part of circuit containing a galvanometer.
When XY is moved the current flows in the direction shown. State the direction in which XY is moved.
Date posted: April 19, 2017. Answers (1)
- In the set up in Fig. 5, the suspended metre rule in equilibrium balanced by the magnet and the weight shown. The iron core is fixed to the bench.(Solved)
In the set up in Fig. 5, the suspended metre rule in equilibrium balanced by the magnet and the weight shown. The iron core is fixed to the bench.
i) State and explain the effect on the metre rule when the switch S, is closed.
ii) What would be the effect of reversing the battery terminals?
iii) Suggest how the set up in figure 5 can be adapted to measure the current flowing in the current circuit.
Date posted: April 19, 2017. Answers (1)
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Figure 12 shows a set up used to determine the mass of a solid S. The rod is pivoted at its centre of gravity C.
i) State two measurements that need to be made to determine the mass of solid S.
ii) Write an expression to show how the measurements in (i) above are used to obtain the mass of S.
Date posted: April 19, 2017. Answers (1)
- Figure 1 shows a lorry moving on an inclined section of a straight road. At the back is a chain hanging from a point on a horizontal axis through the centre of gravity of a lorry.(Solved)
Figure 1 shows a lorry moving on an inclined section of a straight road. At the back is a chain hanging from a point on a horizontal axis through the centre of gravity of a lorry.
State with a reason whether the lorry is stable or not stable.
Date posted: April 19, 2017. Answers (1)