Q1. Which of the following can be used to form a virtual and magnified image of an object?
(a) Both convex mirror and convex lens
(b) Only convex lens
(c) Both concave mirror and convex lens
(d) Only concave lens
Q2. Select the correct statement regarding rods and cones in the human eye.
(a) Cones are sensitive to dim light
(b) Rods are sensitive to bright light
(c) Cones are sensitive to bright light
(d) Rods can sense color
Q3. An object is vibrating at 5000Hz.
The time period of the sound produced is
(a) 0.005 s
(b) 0.02 s
(c) 0.0002 s
(d) 0.05 s
Q4. Which of the following statement is incorrect?
(a) Generally the voice of a man is shriller than that of a woman
(b) A bird makes a high pitched sound whereas a lion makes a low pitched roar
(c) A drum vibrates with a low frequency, therefore it produces a low pitched sound
(d) A whistle has a high frequency and therefore it produces a sound on higher pitch
Q5. Which of the following statements are true about image formation in a plane mirror?
A. The image is larger in size then the object.
B. The image is formed at the same distance as the object.
C. The image is laterally inverted.
D. The image is virtual.
(a) B, C and D
(b) A, C and D
(c) All of these
(d) A, B and C
Q6. An electric circuit is set up in such a way that the positive terminal of a battery V is connected to a bulb B1 which is connected to a resistor R which is connected to bulb B2. B2 is finally connected to the negative terminal of the battery. Both the bulbs are glowing. If the value of R is increased, then
(a) B2 will become dimmer but brightness of B1 will remain unchanged
(b) Both B1 and B2 will remain unchanged
(c) Both B1 and B2 will become dimmer
(d) B1 will become dimmer but brightness of B2 will remain unchanged
Q7. Read the given statement and select the correct option.
A.The rage of clinical thermometer is from 35℃ to 42℃.
B.The range of laboratory thermometer is usually from 10℃ to 110℃.
(a) Both statement A and B are false
(b) Statement A is correct but statement B is false
(c) Statement B is correct but statement A is correct but statement A is false
(d) Both statements A and B are correct
Q8. In which one of the following, heat is transferred by the process of conduction?
(a) Room heater
(b) From sun to earth
(c) From one end of a spoon to the other end, when dipped in hot tea
(d) Sea breeze and land breeze
Q9. Which of the following facts is not correct about magnets?
(a) Attraction is a sure test of magnetism
(b) Magnetic field lines originate from North pole and merge at South pole of a magnet
(c) Like poles of magnet repel each other
(d) Magnetic field is stronger at the poles of a bar magnet
Q10. Which among the following liquids are conductor of electricity?
B. Sugar solution
C. Salt solution
D. Distilled water
(a) A, C and D
(b) B and C
(c) A and C
(d) C and D