INSTRUCTIONS TO CANDIDATES
- Write your name and index number in the spaces provided.
- This paper consists of two sections, A and B.
- Answer ALL the questions in the spaces provided.
- All working must be shown clearly in the spaces provided in this booklet.
- Mathematical tables and electronic calculators may be used.
QUESTIONS
SECTION A (25 MARKS)
- State the laws of reflection (2 marks)
- Distinguish between real and virtual image (2mark)
- An object is placed 30cm from a concave mirror of focal length 20cm. calculate the magnification (2marks)
- A small electromagnetic is used for lifting and releasing a small steel ball.
- Explain why soft iron is better material to use for the core (2marks)
- In order to lift a slightly larger ball, it is necessary to make a stronger electromagnetic. State three ways in which the electromagnet could be more powerful. (3marks)
- State one way in which radio waves can be detected (1mark)
- Define the term lens (1mark)
-
- The figure below shows a convex lens with an object before it. Draw rays to identify the position of image formed (2marks)
- State one device in which such a set-up is used (1mark)
- The figure below shows a convex lens with an object before it. Draw rays to identify the position of image formed (2marks)
-
- Define electric current (1mark)
- A current of 3A passes through bulb B for 4 minutes. Determine the quantity of charge through B. (3 marks)
- Radioactive substance decayes as shown below
How many alpha and beta particles are emitted? (3mks) - The figure below represents a cathode ray beam passing between pole pieces of a permanent magnet. Show the direction of the beam. (2marks)
SECTION B (55 MARKS)
-
- Define capacitance (1mark)
- State any two ways of decreasing the capacitance of a parallel plate capacitor (2marks)
- The diagram bellow shows a pear shaped charged conductor on an insulating stand. (Charge not shown on the diagram)
Show the charge distribution on the diagram. (2mks) - The figure below shows three capacitors A,B and C connected to a battery of e.m.f 12.0V and zero internal resistance
Determine;-- The effective capacitance of the circuit (3marks)
- The p.d across the 12 uf capacitor (3marks)
- Charge stored in the 11uf capacitor (3marks)
-
- You are provided with the following;
A cell and holder, a switch, a rheostat, an ammeter, a voltmeter and connecting wires. Draw a diagram for a circuit that could be used to investigate the variation of the potential difference across the cell with the current drawn from the cell (1mark) - The cell in figure has an e.m.f of 2.6V and negligible internal resistance.
Determine the;- Total resistance in the current (2marks)
- Current in the circuit (3marks)
- Reading on the voltmeter (3marks)
- The sketch bellow shows the p.d a cross a cell for various values of current through a resistance wire
State and explain the significance of p. (2mks) - State faraday’s laws of electromagnetic induction (1mark)
- A bar magnet is moved into a coil of insulated capon wire connect to a center-zero galvanometer as shown below.
- Show on the diagram, the direction of induced current. (1mk)
- State and Explain what is observed on the galvanometer when the north pole of the magnet is moved into the withdrawn from the coil (2marks)
- You are provided with the following;
-
- what is meant by the term work function (1mark)
- When the frequency of the illuminating variation is just equal to the threshold frequency of the surface, no photoelectric effect observed. Explain (1mark)
- A surface whose work function Wo is 2.4eV is illuminated by light of frequency 3.0x1015#Z. calculate the maximum kinetic energy of the ejected photo electrons (h=6.63x10-34Js) (3marks)
- The figure below shows an experimental arrangement s1 and s2 are narrow slits.
State what is observed on the screen when the source is- Monochromatic (2mark)
- White light (2mark)
- What is the function of s1 and s2 (2marks)
- Distinguish between longitudinal and transverse wire giving examples in each case. (2marks)
- The figure below shows the displacement -time and displacement –distance graph of a
From the diagram, if the speed of the wave is 320m/s, determine the wavelength. (2mks)
-
- State the lenz’s law of electromagnetic induction. (1mk)
- The following figure shows a simple microphone in which sound worn from a person talking cause the diaphragm to vibrate.
- Explain how a velocity current is induced in the coil when the diaphragm vibrates. (2mks)
- State two ways in which the induced current in above can be increased. (2mks)
- A transformer with 1200 turns in the primary coil and 120 turns in the secondary coil has 400v applied to its primary circuit from an ac. It is found that when a heater is connected to the secondary circuit, it produces heat at the rate of 600w. Assuming 100% efficiency, determine the;
- Voltage in the secondary circuit. (3mks)
- The current in the primary circuit. (3mks)
Join our whatsapp group for latest updates
Tap Here to Download for 50/-
Get on WhatsApp for 50/-
Download Physics Paper 2 Questions - Lanjet Joint Mock Exams 2022.
Tap Here to Download for 50/-
Get on WhatsApp for 50/-
Why download?
- ✔ To read offline at any time.
- ✔ To Print at your convenience
- ✔ Share Easily with Friends / Students