Get premium membership and access questions with answers, video lessons as well as revision papers.
The electrons flow from the earth through the body and neutralize the positive charge in the electroscope
johnmulu answered the question on February 15, 2017 at 08:56
- Light from a lamp falls on the cap of a negatively charged electroscope. It is observed that the divergence of the leaf decreases(Solved)
Light from a lamp falls on the cap of a negatively charged electroscope. It is observed that the divergence of the leaf decreases. Explain the observation
Date posted: February 15, 2017. Answers (1)
- In some petrol engines where sparks plugs are used, a capacitor is connected to the distributor suggest the function of the capacitor(Solved)
In some petrol engines where sparks plugs are used, a capacitor is connected to the distributor suggest the function of the capacitor.
Date posted: February 14, 2017. Answers (1)
- Name two factors other than tension, which determine the frequency of sound from a stretched wire at room temperature(Solved)
Name two factors other than tension, which determine the frequency of sound from a stretched wire at room temperature.
Date posted: February 14, 2017. Answers (1)
- What are the necessary conditions for interference to occur in waves(Solved)
State the necessary conditions for interference to occur in waves.
Date posted: February 14, 2017. Answers (1)
- A wire is stretched between two fixed points such that when it is plucked, it produces sound. Explain why the pitch of the sound produced may become lower when the temperature of the surrounding rises(Solved)
A wire is stretched between two fixed points such that when it is plucked, it produces sound. Explain why the pitch of the sound produced may become lower when the temperature of the surrounding rises.
Date posted: February 14, 2017. Answers (1)
- What determines the quality of a musical note?(Solved)
What determines the quality of a musical note?
Date posted: February 14, 2017. Answers (1)
- How does a piece of a Polaroid reduce the sun’s glare?(Solved)
Explain how a piece of a Polaroid reduces the sun's glare.
Date posted: February 14, 2017. Answers (1)
- What characteristic of sound is applied in tuning pianos?(Solved)
What characteristic of sound is applied in tuning pianos?
Date posted: February 14, 2017. Answers (1)
- The pitch of the note produced by a wire depends on the tension in the wire. State the other factor that effects the pitch(Solved)
The pitch of the note produced by a wire depends on the tension in the wire. State the other factor that effects the pitch.
Date posted: February 14, 2017. Answers (1)
- Distinguish between stationary and progressive waves(Solved)
Distinguish between stationary and progressive waves.
Date posted: February 14, 2017. Answers (1)
- State a characteristic of sound, which is determined by overtone(Solved)
State a characteristic of sound, which is determined by overtone.
Date posted: February 14, 2017. Answers (1)
- Name the property of light that shows that it is a transverse wave(Solved)
Name the property of light that shows that it is a transverse wave.
Date posted: February 14, 2017. Answers (1)
- Name the property of light that shows that it is a transverse wave(Solved)
Name the property of light that shows that it is a transverse wave.
Date posted: February 14, 2017. Answers (1)
- In an experiment using a ripple tank the frequency, f, of the electric pulse generator was reduced to one third of its value(Solved)
In an experiment using a ripple tank the frequency, f, of the electric pulse generator was reduced to one third of its value. How does the new wavelength compare with the initial wavelength? Explain your answer.
Date posted: February 14, 2017. Answers (1)
- State two ways by which the frequency of a note produced by a given guitar wire may be increased(Solved)
State two ways by which the frequency of a note produced by a given guitar wire may be increased.
Date posted: February 14, 2017. Answers (1)
- State Ohm’s Law(Solved)
State Ohm's Law.
Date posted: February 14, 2017. Answers (1)
- State one condition under which Ohm's law is obeyed in a metal conductor.(Solved)
State one condition under which Ohm's law is obeyed in a metal conductor.
Date posted: February 14, 2017. Answers (1)
- A current of 0.70 A flows through a wire when a p.d. of 0.35 V is applied at the ends of the wire. If the wire is 0.5 m long...(Solved)
A current of 0.70 A flows through a wire when a p.d. of 0.35 V is applied at the ends of the wire. If the wire is 0.5 m long and has a cross section area of 8.0 x 10-3m2. Determine its resistivity.
Date posted: February 14, 2017. Answers (1)
- A circuit consists of a battery, a metal wire, an ammeter and a switch connected in series. The switch is closed and the ammeter reading noted(Solved)
A circuit consists of a battery, a metal wire, an ammeter and a switch connected in series. The switch is closed and the ammeter reading noted. The metal wire is now heated. State the observations made on the ammeter reading and give a reason for your answer.
Date posted: February 14, 2017. Answers (1)
- State the reason why a voltmeter of high resistance is more accurate in measuring potential differences than one of low resistance.(Solved)
State the reason why a voltmeter of high resistance is more accurate in measuring potential differences than one of low resistance.
Date posted: February 14, 2017. Answers (1)