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Class 12 11 10 CUET Notes CBSE

@Class_12_11_10_CUET_Notes_CBSE
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Category: Education

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βœ… Class 12
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βœ… Class 11
βœ… CBSE
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Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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A body dropped from a height h with initial velocity zero, strikes the ground with a velocity 3 m/s. Another body of same mass dropped from the same height h with an initial velocity of 4 m/s. Final velocity of second mass, with which it strikes ground is
Poll
  •   5 m/s
  •   12 m/s
  •   3 m/s
  •   4 m/s
133 votes
1.5k 0 1 4
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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If a car at rest accelerates uniformly to a speed of 144 km/h in 20 s, it covers a distance of
Poll
  •   1440 m
  •   2980 m
  •   20 m
  •   400 m
98 votes
1.4k 0 1 1
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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A car moving with a speed of 40 km/h can be stopped by applying brakes after atleast 2 m. If the same car is moving with a speed of 80 km/h, what is the minimum stopping distance?
Poll
  •   4 m
  •   6 m
  •   8 m
  •   2 m
77 votes
1.2k 0 0 2
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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A particle is thrown vertically upward. Its velocity at half of the height is 10 m/s, then the maximum height attained by it (g= 10 m/s)
Poll
  •   8 m
  •   20 m
  •   10 m
  •   16 m
70 votes
978 0 0
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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A particle moving in a straight line covers half the distance with speed of 3 m/s. The other half of the distance is covered in two equal time intervals with speed of 4.5 m/s and 7.5 m/s respectively. average speed of the particle during this motion is
Poll
  •   4.0 m/s
  •   5.0 m/s
  •   5.5 m/s
  •   4.8 m/s
62 votes
852 0 1
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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If the initial temperatures of metallic sphere and disc, of the sam mass, radius and nature are equal, then the ratio of their rate of cooling in same environment will be
Poll
  •   1:4
  •   4:1
  •   1:2
  •   2:1
57 votes
773 0 0
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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At 127 C radiates energy is 2.7 X 10J/s At what temperature radiated energy is 4.32 X 10 J/s
Poll
  •   400 K
  •   4000 K
  •   80000 K
  •   40000 K
60 votes
734 0 0
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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If the temperature of the sun were to be increased from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on the earth to what it was previously will be
Poll
  •   4
  •   16
  •   32
  •   64
61 votes
740 0 0
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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Suppose the sun expands so that its radius becomes 100 times its present radius and its surface temperature becomes half of its present value. The total energy emitted by it then will increase by factor of
Poll
  •   10
  •   625
  •   256
  •   16
58 votes
860 0 0
Class 12 11 10 CUET Notes CBSE

13 Nov, 16:48

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Star A has radius r surface temperature T While star B has radius 4r and surface temperature T/2. The ratio of the power of two starts, P:P, is
Poll
  •   16 :1
  •   1:16
  •   1:1
  •   1:4
71 votes
863 0 0
Class 12 11 10 CUET Notes CBSE

24 Oct, 15:23

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3.8k 0 0 3
Class 12 11 10 CUET Notes CBSE

17 Oct, 18:59

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4.4k 0 5 5
Class 12 11 10 CUET Notes CBSE

4 Oct, 15:51

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In a p-type semiconductor, the majority charge carriers are:
Poll
  •   Electrons
  •   Holes
  •   Protons
  •   Neutrons
473 votes
5k 0 3 8
Class 12 11 10 CUET Notes CBSE

4 Oct, 15:51

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Which of the following statements about the energy band gap of a semiconductor is correct?
Poll
  •   It is the energy difference between the valence band and the conduction band.
  •   It is the energy difference between two energy levels within the valence band.
  •   It is the energy difference between two energy levels within the conduction band.
  •   It is the energy of the electrons in the valence band.
256 votes
4.8k 0 4 1
Class 12 11 10 CUET Notes CBSE

4 Oct, 15:51

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In a semiconductor, an increase in temperature will:
Poll
  •   Decrease the conductivity
  •   Increase the conductivity
  •   Have no effect on conductivity
  •   Increase the resistance
285 votes
4.2k 0 3 1
Class 12 11 10 CUET Notes CBSE

4 Oct, 15:51

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A system of particles is in equilibrium. What is the condition for the net external torque acting on the system?
Poll
  •   Must be zero
  •   Must be constant
  •   Must be maximum
  •   Must be minimum
236 votes
3.9k 0 2 1
Class 12 11 10 CUET Notes CBSE

4 Oct, 15:51

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In a system of particles, if the net external force acting on the system is zero, what can be said about its linear momentum?
Poll
  •   Must be zero
  •   Must be constant
  •   Must be maximum
  •   Must be minimum
225 votes
3.2k 0 2
Class 12 11 10 CUET Notes CBSE

4 Oct, 15:51

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What is the angular momentum of a system of particles conserved with respect to?
Poll
  •   Net external torque
  •   Net external force
  •   Total energy
  •   Linear momentum
201 votes
3k 0 2 1
Class 12 11 10 CUET Notes CBSE

4 Oct, 15:51

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If a system of particles is isolated and experiences no external torque, what can be concluded about its angular momentum?
Poll
  •   It must be zero
  •   It must be constant
  •   It must be maximum
  •   It must be minimum
169 votes
2.9k 0 2 1
Class 12 11 10 CUET Notes CBSE

4 Oct, 15:51

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In a system of particles, if the net external torque is applied for a certain time, what is the relationship between the change in angular momentum and the torque applied?
Poll
  •   Change in angular momentum is directly proportional to the torque applied
  •   Change in angular momentum is inversely proportional to the torque applied
  •   Change in angular momentum is proportional to the square of the torque applied
  •   Change in angular momentum is unrelated to the torque applied
134 votes
2.7k 0 3 3
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