On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the air is 38.8 mmHg. What is the relative humidity?
- A. 70
- B. 62
- C. 80
- D. 42
A missile is launched with a speed of 75 ms-1 at an angle of 22° above the surface of a warship. Find the horizontal range achieved by the missile. Ignore the effects of air resistance.
[Take g = 10 ms-2]
- A. 195
- B. 271 m
- C. 391 m
- D. 136 m
Find the tension in the two cords shown in the figure above. Neglect the mass of the cords, and assume that the angle is 38° and the mass m is 220 kg
[Take g = 9.8 ms-2]
- A. \(T_1\) = 2864 N, \(T_2\)= 3612 N
- B. \(T_1\)= 3612 N, \(T_2\) = 2864 N
- C. \(T_1\)= 3502 N, \(T_2\)= 2760 N
- D. \(T_1\) = 2760 N, \(T_2\) = 3502 N
Which of the following statements regarding the application of electrical conduction via gases is/are correct?
Electrical conduction in gas is applied in:
(i) The identification of gases
(ii) Lighting/fluorescent tubes
(iii) Photocells
(iv) Cathode ray oscilloscope/T.V. tubes
- A. (i), (iii) and (iv) only
- B. (i), (ii) and (iv) only
- C. (ii), (iii) and (iv) only
- D. (i), (ii) and (iii) only
The property of wave shown in the diagram above is?
- A. Diffraction
- B. Refraction
- C. Polarisation
- D. Interference
If an object just begins to slide on a surface inclined at 30º to the horizontal,the coefficient of friction is?
- A. √3
- B. \(\frac{√3}{2}\)
- C. \(\frac{1}{√2}\)
- D. \(\frac{1}{√3}\)
The mercury column in the barometer at notational atmospheric pressure has a height of?
- A. 0.76 cm at see level
- B. 760 cm at sea level
- C. 7.6 cm at sea level
- D. 76 cm at sea level
One of the following is a scalar quantity?
- A. weight
- B. momentum
- C. potential energy
- D. displacement
A semiconductor is formed by?
- A. co-ordinate bonds
- B. electrovalent bonds
- C. a substance free of bonds
- D. covalent bonds
The main factor which affects the speed of sound wave is the?
- A. properties of the medium
- B. amplitude of the sound wave
- C. intensity of the sound wave
- D. loudness of the sound wave
A train of mass 1600 kg attains a speed of 25 ms\(^{-1}\) in 20 seconds. The power developed in the engine is?
- A. 2.5 KW
- B. 80 KW
- C. 25 KW
- D. 50 KW
What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperature? (Specific latent heat of ice = 336 Jg\(^{-1}\))
- A. 7.06 x 10\(^{3}\)J
- B. 5.38 x 10\(^{3}\)J
- C. 6.72 x 10\(^{3}\)J
- D. 1.35 x 10\(^{3}\)J
The graph of pressure (P) against the reciprocal of the volume (I/V) in Boyles’s law is a?
- A. hyperbola
- B. parabola
- C. curve
- D. straight line
Which expression gives magnetic flux?
- A. qVB sin\(\theta\)
- B. \(\frac{\mu \phi I}{2 \pi r}\)
- C. BA cos \(\theta\)
- D. -N \(\frac{d \phi}{dt}\)
The amount of energy required to change a kilogram of ice block into water without a change in temperature is?
- A. specific latent heat of fusion of ice
- B. specific heat capacity of ice
- C. heat capacity of ice
- D. specific heat of vaporization of ice
The gravitational pull on the moon is \(\frac{1}{6}\) that of the earth. If a body weighs 6.0 N on the moon, what will be the weight on the earth?
- A. 6.0 N
- B. 5.0 N
- C. 12.0 N
- D. 36.0 N
The eclipse of the moon occurs when?
- A. the moon reflects the rays from the sun to the earth
- B. the moon comes exactly between the earth and the sun
- C. the earth comes exactly between the moon and the sun
- D. the sun comes exactly between the earth and the moon
In order to view the sun, the most suitable instrument to use is?
- A. helioscope
- B. telescope
- C. stroboscope
- D. sun meter
Which component of fiber-optic connector has a provision of entry for the fibre along with the fixation to connector housing?
- A. coupling device
- B. cable
- C. ferrule
- D. connector housing
In the formation of sea breeze, wind blows from?
- A. sky to land
- B. sea to sky
- C. land to sea
- D. sea to land
Which of these is a second-class lever?
- A. sugar tongs
- B. claw hammer
- C. plier
- D. wheelbarrow