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- A plastic ring is placed between two poles of a magnet as shown in figure below. Show the magnetic lines of force between the two...(Solved)
A plastic ring is placed between two poles of a magnet as shown in figure below. Show the magnetic lines of force between the two poles.
![physics2632019137.png](/questions/uploads/physics2632019137.png)
Date posted: March 26, 2019. Answers (1)
- Figure below shows a ring main circuit used by an electrician in a certain house.(Solved)
Figure below shows a ring main circuit used by an electrician in a certain house.
![physics2632019131.png](/questions/uploads/physics2632019131.png)
Identify two faults in the installation.
Date posted: March 26, 2019. Answers (1)
- A girl of mass 40 kg stands on a scale balance in a lift. The lift is upwards. At one instant the acceleration of the...(Solved)
A girl of mass 40 kg stands on a scale balance in a lift. The lift is upwards. At one instant the acceleration of the lift is 2m/s. Calculate the reading on the scale at that instant.
Date posted: March 26, 2019. Answers (1)
- A 2 kg body slides down a smooth slope from a height of 5m. As it reaches the horizontal, it strikes another body of mass...(Solved)
A 2 kg body slides down a smooth slope from a height of 5m. As it reaches the horizontal, it strikes another body of mass 3 kg which is at rest. Both bodies stick together. Calculate the velocity of the bodies after collision.
Date posted: March 26, 2019. Answers (1)
- A wire of resistance 20 Ohms is connected to a battery of 12V. Determine the heat dissipated in the wire in one minute.(Solved)
A wire of resistance 20 Ohms is connected to a battery of 12V. Determine the heat dissipated in the wire in one minute.
Date posted: March 26, 2019. Answers (1)
- A rocket propelled upward with a constant thrust. Assuming friction due to air is negligible and the burning of the fuel is steady. Explain its...(Solved)
A rocket propelled upward with a constant thrust. Assuming friction due to air is negligible and the burning of the fuel is steady. Explain its motion.
Date posted: March 26, 2019. Answers (1)
- Figure below shows a cell of Emf E volts and internal resistance r ohms. Connected to an external resistor R. If the current flowing is...(Solved)
Figure below shows a cell of Emf E volts and internal resistance r ohms. Connected to an external resistor R. If the current flowing is 0.5A, find and expression for the internal resistance r.
![physics2632019117.png](/questions/uploads/physics2632019117.png)
Date posted: March 26, 2019. Answers (1)
- Two masses of 3kg and 7kg are connected by a light string. The 3 kg mass rests on a smooth incline plane 300 to the...(Solved)
Two masses of 3kg and 7kg are connected by a light string. The 3kg mass rests on a smooth incline plane 300 to the horizontal. The 7kg mass hangs freely from the friction-less pulley attached to the top of plane.
i) Draw a diagram showing the bodies and identify the forces acting on the 3 kg mass.
ii) Calculate the acceleration of the masses.
Date posted: March 26, 2019. Answers (1)
- A student was investigating the brightness of bulbs when set up in different circuits. He used identical bulbs and cells.He set up circuits A and...(Solved)
A student was investigating the brightness of bulbs when set up in different circuits. He used identical bulbs and cells.He set up circuits A and B as shown in figure (A) and (B) below.
![physics2632019107.png](/questions/uploads/physics2632019107.png)
State and explain which set up had the bulbs light brightest.
Date posted: March 26, 2019. Answers (1)
- A positively charged material was brought close to an insulated metallic object as shown in figure below. Show the distribution of charge in the object.(Solved)
A positively charged material was brought close to an insulated metallic object as shown in figure below. Show the distribution of charge in the object.
![physics26320191259.png](/questions/uploads/physics26320191259.png)
Date posted: March 26, 2019. Answers (1)
- A boy scout standing a distance x from a tall building blows a whistle and hears its echo 1.7 seconds later. Determine the
distance X between...(Solved)
A boy scout standing a distance x from a tall building blows a whistle and hears its echo 1.7 seconds later. Determine the
distance X between the boy and the wall given that the speed of sound in air is 340m/s.
Date posted: March 26, 2019. Answers (1)
- Figure below represents an object O and its image I after reflection by a convex mirror. On the same diagram locate by construction the principal...(Solved)
Figure below represents an object O and its image I after reflection by a convex mirror. On the same diagram locate by construction the principal focus F of the mirror.
![physics26320191250.png](/questions/uploads/physics26320191250.png)
Date posted: March 26, 2019. Answers (1)
- Water waves have a speed of 24cm/s in the deep water. Consecutive waves crests are 0.08m apart in the deep water.calculate the frequency of the...(Solved)
Water waves have a speed of 24cm/s in the deep water. Consecutive waves crests are 0.08m apart in the deep water.calculate the frequency of the source producing the wave.
Date posted: March 26, 2019. Answers (1)
- Plane water waves produced in a ripple tank are passed from a region of deep water into a region of shallow water. Figure below shows...(Solved)
Plane water waves produced in a ripple tank are passed from a region of deep water into a region of shallow water. Figure below shows the top view of the tank.
![physics26320191234.png](/questions/uploads/physics26320191234.png)
State what happens at the boundary to the frequency of the waves.
Date posted: March 26, 2019. Answers (1)
- A ray of light is incident on a plane mirror as shown in figure below.(Solved)
A ray of light is incident on a plane mirror as shown in figure below.
![physics26320191230.png](/questions/uploads/physics26320191230.png)
Determine the angle of reflection.
Date posted: March 26, 2019. Answers (1)
- State a factor that determines the angle at which a road should be banked at a bend.(Solved)
State a factor that determines the angle at which a road should be banked at a bend.
Date posted: March 26, 2019. Answers (1)
- A stone of mass 200g tied to a long string 1m long and whirled round in a vertical circle at an angular speed of 6.28...(Solved)
A stone of mass 200g tied to a long string 1m long and whirled round in a vertical circle at an angular speed of 6.28 rad/s.
i) Why is the stone said to be accelerating.
ii) Determine the linear velocity.
iii) Its periodic time.
iv) The critical speed of the stone if it is to describe a vertical circle.
Date posted: March 26, 2019. Answers (1)
- Figure below shows a small mass being rotated in a horizontal circle through a plastic tube. It is observed that as the small moves is...(Solved)
Figure below shows a small mass being rotated in a horizontal circle through a plastic tube. It is observed that as the small moves is rotated at constant speed, the heavy mass remains at the same horizontal level.
![physics26320191216.png](/questions/uploads/physics26320191216.png)
i) State one adjustment that can be done to make the heavy mass move upwards.
ii) State the effect on the small mass if a heavier mass was used in place of the one above and the radius of rotation remains constants.
Date posted: March 26, 2019. Answers (1)
- A mass is projected horizontally from height of 5m above the ground with a velocity of 30m/s. Calculate:(Solved)
A mass is projected horizontally from height of 5m above the ground with a velocity of 30m/s. Calculate:
a) The time taken to reach the ground
b) The horizontal distance traveled before hitting the ground
c) The vertical velocity with which the mass hits the ground
Date posted: March 26, 2019. Answers (1)
- Figure below shows a block of dimensions 2cm × 4cm × 12cm floating in a liquid of density 1250kg/m³(Solved)
Figure below shows a block of dimensions 2cm × 4cm × 12cm floating in a liquid of density 1250kg/m³
![physics26320191210.png](/questions/uploads/physics26320191210.png)
Find
i) The upthrust on the block.
ii) The weight of the block.
iii) The force needed to just submerge the block completely.
Date posted: March 26, 2019. Answers (1)