Loading....
|
Press & Hold to Drag Around |
|||
|
Click Here to Close |
|||
Question 1 Report
If the size of the hole of a pinhole camera is increased, the image formed becomes
Answer Details
Question 2 Report
An object weighing 0.60N is hung on a spiral spring and caused it to extend by 6.0cm. The object is removed and a black of wood replacing it causes the spring to extend by 10.0cm. What is the weight of the block of wood?
Question 3 Report
It is NOT possible to determine exactly and simultaneously the position and momentum of a particle. This statement is known as the
Answer Details
Question 4 Report
The ability of the eye to focus on objects at various distances is known as
Question 5 Report
An object 8cm in front of a plane mirror moves at a speed of 6cm s-1 away from the mirror. What will be the distance separating the object and the image after 2s?
Answer Details
Question 6 Report
An a.c. generator can be converted into a d.c. generator by replacing
Answer Details
Question 7 Report
Which radiation is emitted when a beam of fast moving cathode rays is stopped by a heavy element?
Answer Details
Question 8 Report
A negatively charged rod is brought near the cap of an electroscope. The cap is earthed momentarily while the charge is near to it. The rod is then removed. Which statement is correct?
Answer Details
Question 9 Report
A transformer supplies 12V when connected to a 240V mains. If the transformer takes 0.120A from the mains when used to light a 12V, 24W lamp, what is its efficiency?
Answer Details
Question 11 Report
A body of weight 20N displaces 12N of the liquid in which it is immersed. What is the upthrust of the liquid on the body?
Answer Details
Question 12 Report
What is the escape velocity of a satellite launched from the earth’s surface? (Take g as 10ms-2 and the radius of the earth as 6.4 × 106m)
Answer Details
Question 13 Report
What part of the camera corresponds to the iris of the eye?
Question 14 Report
If the temperature of a resistance wire is gradually increased, its resistance will
Answer Details
Question 15 Report
If the refractive index of water is 1.33, what is the critical angle for a water-air boundary?
Question 16 Report
Which of the following is/are TRUE of nuclear fission?
I. A heavy nucleus is split into two nuclei of comparable masses.
II. Two light nuclei are joined together to form a heavier nucleus.
III. The total mass of the products is less than that of the reactants.
Answer Details
Question 19 Report
An air bubble of volume 4cm3 is formed 20m under water. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10cm of water?
Answer Details
Question 20 Report
Which process will increase the rate of oscillation of a pendulum?
Answer Details
Question 21 Report
Which device does NOT make use of the magnetic effects of an electric current?
Answer Details
Question 23 Report
A converging lens of focal length 5cm forms a virtual image which is 20cm from the lens. How far from the lens is the object?
Answer Details
Question 24 Report
A man stands in front f a high wall and produces a sound. If he receives the echo of the sound four seconds later, what is his distance from the wall? [The speed of sound in air is 330ms-1]
Answer Details
Question 25 Report
A block of ice of mass 10kg at 0°C absorbs heat energy from its surroundings and changes to water at the same temperature. The heat absorbed is referred to as
Answer Details
Question 26 Report
The use of electrical fuses in domestic wiring is
Question 27 Report
A body executing a simple harmonic motion has an angular velocity of 22 radians per second. If it has a maximum
Answer Details
Question 28 Report
An object is projected with a velocity of 50ms-1 from ground level at an angle θ to the vertical. If the total time of flight of the projectile is 5s, what is the value of θ? (g = 10ms-2)
Answer Details
Question 30 Report
A body of mass 4 kg is accelerated from rest by a steady force of 9N. What is its speed when it has travelled a distance of 8m?
Question 31 Report
According to the Kinetic Theory, what does NOT occur when the temperature of a constant volume of gas is increased?
Answer Details
Question 32 Report
Which statement is NOT correct about Rutherford’s model of the atom?
Question 34 Report
The energy stored in a capacitor of capacitance 5 μF is 40J. What is the voltage applied across its terminals?
Question 35 Report
In which of the following are the substances arranged in descending order of their thermal conductivities?
Answer Details
Question 36 Report
A brass cube of side 10cm is heated through 30°C. If the linear expansivity of brass is 2.0 × I0\(^{-5}\) K-1 , what is the increase in its volume?
Answer Details
Question 37 Report
A body is uniformly accelerated from rest. Which of the following quantities vary/varies linearly with the square of the time?
I. Displacement
II. Velocity
III. Momentum
Answer Details
Question 38 Report
When a current of 1 .0A flows in an electrolyte for 3.0h, a mass of 1 .0g is deposited. What mass will be deposited in 10.0h if a current of 3.0A flows through the electrolyte?
Answer Details
Question 39 Report
In which simple machine is the effort applied between the load and the fulcrum?
Answer Details
Question 40 Report
A body of mass M1 moving with a velocity U collides with a stationary body of mass M2 and both move with a common velocity V. If linear momentum is conserved, which expression correctly represents V?
Answer Details
Question 41 Report
The phenomenon of photoelectric effect is NOT used in
Question 42 Report
The wavelength of a stationary wave is 36.0cm. What is the distance between a node and the next anti-node?
Answer Details
Question 43 Report
Which colour is deviated least when white light passes through a triangular prism?
Question 44 Report
In an operating X-ray tube, a high p.d is applied between the cathode and the anode for the purpose of
Answer Details
Question 45 Report
A platinum-resistance thermometer has a resistance of 10 ω at 0°C and 18 ω at 100°C. Assuming that resistance changes uniformly with temperature, what is the resistance of the thermometer when the temperature is 45°C?
Answer Details
Question 46 Report
Which is a fundamental unit?
Question 47 Report
An electric heater takes 4A when operated on a 250V supply. What is the cost of the electricity consumed at 10k per kWh when the heater is used for 5 hours?
Answer Details
Question 48 Report
A short response time is obtained in a liquid-in-glass thermometer when the
Answer Details
Would you like to proceed with this action?