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Punjab (PTB) · Quarter book test · Free

1st Year Physics 1st Quarter Book Paper

40 marks · 1 hour · 28 questions. Covers: CHAP 1: Measurements, CHAP 2: Force and Motion, CHAP 3: Circular and Rotational Motion.

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1st Year Physics 1st Quarter Book Paper

1st Year · Physics · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 40Time: 1 hour

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

  1. If cross product of two vectors x points along positive z-axis, then the vectors  and  must lie in:

    1. yz-plane

    2. xz-plane

    3. zy-plane

    4. No plane

  2. Which quantity of the following is dimensionless?

    1. Angular velocity

    2. Angular acceleration

    3. Centripetal force

    4. Angular displacement

  3. Which of the following is a derived quantity?

    1. Force

    2. Mass

    3. Length

    4. Time

  4. When an object is in free fall, what force is acting on it (Neglecting air resistance)?

    1. Frictional force

    2. Magnetic force

    3. Gravitational force

    4. Electric force

  5. Centripetal force performs:

    1. Maximum work

    2. Minimum work

    3. Negative work

    4. No work

  6. Which is the base quantity?

    1. Area

    2. Volume

    3. Length

    4. Density

  7. The projectile gains its maximum height at an angle of:

    1. 0o

    2. 45o

    3. 60o

    4. 90o

  8. In rotational motion, the torque is equal to rate of change of:

    1. Angular velocity

    2. Linear momentum

    3. Angular Momentum

    4. Angular acceleration

  9. One giga is equal to:

    1. 109

    2. 10-9

    3. 1012

    4. 10-12

  10. A body having uniform acceleration of 10ms-2 has the velocity of 100ms-1. In what time its velocity will be double?

    1. 8s

    2. 10s

    3. 12s

    4. 14s

  11. If a car moves with a uniform speed of 2ms-1 in a circle of radius 0.4 m, its angular speed is:

    1. 4 rad s-1

    2. 5 rad s-1

    3. 2 rad s-1

    4. 0.4 rad s-1

  12. The solid angle subtended at the centre of sphere by an area of its surface equal to the square of radius of the sphere is called:

    1. Degree

    2. Redian

    3. Minute

    4. Steradian

Q2. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. Banked tracks are needed for turns on higway. why?

  2. What is thrust?

  3. Differentiate between dimensional and non-dimensional constant.

  4. What is weightlessness?

  5. Can a vector have a component greater than the vector's magnitude?

  6. How uncertainty can be reduced in a timing experiment?

  7. Mass is a measure of inertia in linear motion. What is its analogue in rotational motion? Describe briefly.

  8. Describe the circumstances for which velocity and acceleration of a vehicle are: (i) v is zero but a is not zero, (ii) a is zero but v is not zero. (iii) perpendicular to one another.

  9. How many nano seconds in 1 year?

  10. What is the significant of moment of inertia?

  11. Which quantity remains same at all points on the trajectory of a projectile either velocity or acceleration? Explain.

  12. Three students measured the length of a rod with a scale which minimum division is 1 mm and recorded as (i) 0.4235 m (ii) 0.42 m (iii) 0.424 m. Which record is correct and why?

Q3. Long questions (Attempt any 3 of 4 · 3 × 4 = 12)

  1. Define first equation of motion by graphical method.

  2. What are artificial satellites? Calculate the minimum time period necessary to put a satellite into the orbit near the surface of the Earth.

  3. State the conventions for using Si units in detail.

  4. Why does range R of a projectile remain the same when angle of projection is changed from 0 to 0' = 90o - 0. Also show that for complementary angles of projection, the ration R/R' is equal to 1.