1. Which law states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them?
2. The force between two parallel current-carrying conductors is:
3. The velocity of sound in air at NTP is approximately:
4. The half-life of a radioactive substance is 5 years. If the initial quantity is 200 g, how much of the substance will remain after 15 years?
5. Which of the following is not a thermodynamic process?
6. In a projectile motion, the horizontal range is maximum when the angle of projection is:
7. Which of the following is a scalar quantity?
8. A ball is thrown vertically upward with an initial velocity of 30 m/s. How long does it take to reach the highest point? g = 10
9. A projectile is fired with an initial velocity of 50 m/s at an angle of 30° with the horizontal. What is the horizontal range of the projectile? Take g = 10
10. The unit of force in the CGS system is:
11. A transformer has 500 turns in its primary coil and 10,000 turns in its secondary coil. If the input voltage is 220 V, what is the output voltage?
12. A circuit has a resistance of 10 ohms and a current of 2 A flows through it. What is the potential difference across the resistor?
