( chapter 1 -4 class 11th)
There are 20 questions in this question paper. Students have to solve it in 25 minutes only .
Test NEET/JEE (ch-1,2,3,4)
1. A new system of units is proposed in which unit of mass is A kg . unit of length is B kg and unit of time is C s , What will be the value of 5 j in new system?
(a) 5AB2C-2 (b) 5A-1B-2C2 (c) 5 A-2 B-1 C-2 (d) 5 A-1 B-1 C2
2. If linear momentum P , area A and time t is taken as fundamental units then the dimensional formula of energy is (a) P1 A-1 t-1 (b) P2 A1 t1 (c) P1 A-1/2 t1 (d) P1 A1/2 t-1.
3. If E , m,L and G denotes energy , mass , length and gravitational constant then the ( EL2 /m5G2) has the dimension of (a) mass (b) length (c) time (d) angle.
4. The period of oscillation of time period T is 2π(l/g)1/2 measured value of l is 10 cm is known as 1mm accuracy ant time for 100 0scillations of the pendulum is found to be 50 s using a wrist watch of 1s resolution . What is the accuracy in the measurement of g ?
(a)2% (b) 3% (c) 4% (d) 5% .
5. Two resistors of resistance R1=100+-3 Ohm R2=200+-4 Ohm then the equivalent resistance of parallel combination is (a) 66.7 +-1.8 (b) 66.7+- 4 (c) 66.7+-3 (d)66.7+-7 Ohm.
6. A cube has a side of length 1.2 x 10-2 its volume upto correct significant figure is (a) 1.7×10 -6 (b) 1.73×10 -6 (c) 1.78×10 -6(d) 1.732×10 -6.
7. T he position of the object moving along x-axis is given by x= a+bt2, where a=8.5 b=2.5 and t is measured in seconds. The average velocity of the object between t=2s to t=4 s in m/s is (a) 5 (b) 10 (c) 15 (d) 20 .
8. A player throw a ball vertically upwards with velocity u at highest pint , (a) both velocity and acceleration are zero (b) The velocity of the ball is u and acceleration is zero (c)The velocity of the ball is 0 but acceleration is g (d) the velocity of the ball is u and acceleration is g .
9. If a lift is moving upward with velocity 5m/s a girl throw a ball upward with speed 50m/s the ball will returns on her hand in time (a)5s (b)10s (c) 15s (d) 20s.
10. A boy sliding on the smooth inclined plane requires 4 s to reach on the ground starting from rest from the top . How much time will it take to cover one fourth the distance starting from rest at the top?
(a) 1s (b) 4s (c)2s (d)16s .
11. A particle is released from rest from a tower of height 3h . the ratio of the intervals of time to cover three equal heights h is (a) t1:t2: t3 = 3:2:1 (b) t1:t2: t3 =1: (√2-1)(:√3-2) (c) t1:t2: t3 =√3:√2:1 (d) t1:t2: t3 = 1:√2-1): (√3-√2).
12. A ball A is thrown upward with velocity u at the same time another ball B is released from rest at height H, at time t the speed of A relative to B is (a) u (b) u-2gt (c) (u2-2gh)1/2 (d)u-gt.
13. A vehicle travel half the distance L with speed V1 and other half with speed V2 then its average speed is , (a) (V1 + V2)/2 (B) (2V1+V2)/V1+ V2 (C) 2V1V2/V1+V2 (D) L(V1+ V2)/V1V2 .
14. Two vectors and A+B = C then A and B are (a) parallel (b) perpendicular (c) anti-parallel (d) null vector.
15. If resultant of two equal vectors is equal to the either forces Then the angle between these two vectors is ,(a) 900 (b) 1200 (c) 600 (d) 300
16. if dot product of two vectors is null vector then the angle between these two vectors is (a) 0 (b) 1200 (c) 900 (d) 450 .
17. If then then which of the following statement is correct ( a) vector A is perpendicular to vector B (b) vector A is parallel to vector C (c) vector b is parallel to vector C (D) vector A is perpendicular to vector C .
18.Two vectors magnitude of A,B and C are 3,5,4 respectively then (a)the angle between A and B is 900 . angle between A and C is 900. (c) angle between B and C is 900(d) angle between A and B is 00.
19. If unit vector of a vector is represented as 0.5 – 0. 8 +c then the value of c is (a) √0.01 (b) √0.11 (c) √0.39 (d) 1.
20. The component of a vector A is along X-axis will have maximum value if (a)vector A is along positive Y axis (b)vector A along positive x-axis (c) vector A makes angle 450 with the x-axis (d) A is along negative X aixis.