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Quiz Description :
Name : Basic of Physics quiz1
Subject : Physics
Topic : General
Questions: 15 mcq
Time Allowed : 10 min
Important for : School students of class 9th, 10th, 11th, 12th, B. Sc., M. Sc., UPSC, SSC and State level competitions.
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 Question 1 of 15
1. Question
1 pointsA block is resting on a piston which is moving vertically with SHM of period 1s. At what amplitude of motion will the block and piston separate?
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2. Question
1 pointsA radioactive element x converts into another stable element y. Half life of x is 2 h, initially only x is present, after time t, the ratio of atoms of x and y is found to be 1:4 then t in hour is –
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3. Question
1 pointsThe shortest wavelength of the Brackett series of hydrogen like atom (atomic no. = Z) is the same as the shortest wavelength of the Balmer series of hydrogen atom. The value of Z is –
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4. Question
1 pointsA car moves on a circular road. It describes equal angles about the centre in equal intervals of time. Which of the following statements about the velocity of the car is true?
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5. Question
1 pointsA convex lens of focal length 20 cm placed in contact with a plane mirror acts as a
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6. Question
1 pointsThe root mean square and most probable speed of the molecules in a gas are –
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7. Question
1 pointsA ball is thrown up at an angle with the horizontal. Then the total change of momentum by the instant it returns to ground is –
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8. Question
1 pointsIn the propagation of light waves, the angle between the direction of vibration and plane of polarisation is –
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9. Question
1 pointsAt what speed, the velocity head of water is equal to pressure head of 40 cm of Hg?
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10. Question
1 pointsThe operation of a nuclear reactor is said to be critical, if the multiplication factor (k) has a value –
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11. Question
1 pointsDiwali rocket is ejecting 50 g of gases/s at a velocity of 400 m/s. The acceleration force on the rocket will be –
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12. Question
1 pointsA symmetric double convex lens is cut in 2 equal parts by a plane perpendicular to the principal axis. If the power of the original lens is 4D, the power of a cut lens will be –
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13. Question
1 pointsWhich of the following parameters does not characterise the thermodynamic state of matter ?
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14. Question
1 pointsA sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of –
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15. Question
1 pointsA transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is approximately –
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