Physics Paper 1 November 2002

The base unit for gravitational field strength is

A body travelled in a straight line as shown in the velocity(v) - time(t) graph. Which distance(s)-time(t) graph correctly represents the motion of the body?

A missile is launched at an acute angle to the horizontal. Half-way through its trajectory, it explodes into several fragments due to entirely internal forces. Assuming free fall throughout, which statement is true?

A uniform metre rule of weight 0.9N is suspended horizontally by two vertical loops of thread P and Q placed at 20cm and 30cm from its ends respectively. Find the shortest distance from the centre of the rule at which a 2N weight must be suspended to make loop P become slack.

Two trolleys are travelling in the same direction as shown in the diagram. The trolleys collide. After impact they move off together. What is the amount of kinetic energy lost?

A particle of mass $m$ is placed in the centre of a large uniform circular ring of mass $M$ as shown in the diagram. The radius of the ring is $r$. What is the magnitude of the gravitational force acting on the particle due to the ring?

The energy variation of a particle which is subjected to simple harmonic motion is illustrated graphically as shown. Which combination correctly explains the graph?

In a Young's double slit experiment using red light the fringe separation was 0.25mm. wave length of red light = $6.5 \times 10^{-7}$m, wave length of green light = $5.2 \times 10^{-7}$m. What is the fringe separation when the green light is used in this experiment?

Which of the following is an experimental evidence that light is transverse in nature?

The following diagram shows part of a stationary wave where N₁, N₂ and N₃ are nodes. Which of the following points is in phase with point X.

The ratio of the wavelength of radio waves to X-rays is given by $10^m : 1$. Which of the following is a possible value for m?

Two small charged spheres X and Y of small masses are hung by identical fine nylon threads from a fixed point O. In equilibrium, the angle $\alpha$ is less than angle $\beta$. Which of the following statements must be correct?

The electric potentials (V) at different distances, $x$, from a point P along a line PQ are shown in the table. The electric field strength when $x = 0.040$m is approximately

The diagram shows a potential divider which is used to give outputs of 3V and 6V from a 15V source. What are the correct values of resistors?

Two identical cells are connected to a resistor R and an ammeter in two ways as shown in the diagrams. The current flowing through the ammeter in both circuits are equal. What is the internal resistance of each cell?

An alternating current with the wave form and magnitude shown in the diagram passes through a milliameter calibrated for r.m.s. readings of current. What current, in mA, will the meter record?

The following circuit is used to investigate the charging and discharging of a capacitor. Which combination of positions of switches is true when the capacitor is charging?

The diagram shows two coils X and Y which are positioned with their axes in the same line. The current flowing through X, $i_x$ varies with time $t$ as shown in the graph below. Which graph best illustrates the variation of the induced current $i_y$ with the time t in the coil Y?

In the circuit shown below the internal resistance of the cell is 0.2Ω. The electromotive force of the cell is 6V. What is the voltmeter reading when the current flowing through the cell is 2A?

A copper rod carrying a current $I$ is placed at right angles to a uniform magnetic field $B$ as shown in the diagram. Which one of the following diagrams shows correctly the relative directions of the field (B), the drift velocity (v) of the electrons and the force F on the electrons?

A capacitor is used for smoothing in a half-wave rectifier. In which of the following circuits is the capacitor correctly connected?

Two different liquids L and M, which do not mix, settle in a tube in two layers as shown in the diagram. The tube is inclined to the horizontal. The densities of the liquids are $2\rho$ for L and $\rho$ for M. Which graph shows the variation of pressure with height $h$ from point X along the tube?

A wire with the initial length $l$ and the cross sectional area $a$ was used to hang a weight $W$ from the ceiling. It was found when the weight $W$ was halved the extension was reduced by $l/10$. What is the Young's modulus of the material of the wire?

Which statement about the thermodynamic temperature scale is false?

Study the following statements about the specific heat capacity of a material. 1. The amount of heat energy needed to raise the temperature of a material by 1°C is the specific heat capacity of the material. 2. Water is a very good coolant because it has a high specific heat capacity. 3. The specific heat capacity depends on the temperature and the mass of the material. Which statement is/are true?

A gas is compressed and then allowed to expand as shown in the graph. What could be the correct representation of the internal energy change of the gas at the end?

The diagram shows a discharge tube in which an electron is accelerated through a high voltage between the cathode and the anode. The cathode and the anode are 20cm apart and the high voltage is 5000V. What is the speed of the electron when it hits the anode?

The eye can detect light when it absorbs energy at a rate of $10^{-17}$W. The average wavelength of light is $5.0 \times 10^{-7}$m. Approximately how many photons can the eye absorb in one second when it detects light?

Which curve roughly illustrate the variation of binding energy per nucleon of all elements?

Naturally occurring radioactive elements such as uranium, actinium and thorium disintegrate to form new elements. (element/atomic number: radium 88, actinium 89, thorium 90, protactinium 91, uranium 92). Which disintegration is wrong?