Physics Questions and Answers Part-11

1. Rate of doing work is called
a) Capacity
b) Energy
c) Power
d) current

Answer: c
Explanation: In physics, power is the rate of doing work. It is the amount of energy consumed per unit time. The unit of power is the joule per second (J/s), known as the watt.

2. The energy associated with motion is called
a) Potential energy
b) kinetic energy
c) Both A & B
d) None of the above

Answer: b
Explanation: The energy associated with motion is called kinetic energy.

3. The boiling point of water decreases at higher altitudes is due to
a) Low temperature
b) Low atmospheric pressure
c) High temprature
d) High atmospheric pressure

Answer: b
Explanation: The boiling point of water decreases at higher altitudes is due to low atmospheric pressure.

4. At boiling point of liquids, its
a) Temperature increases
b) Atmospheric pressure increases
c) Temperature remains constant
d) Vapour pressure decreases

Answer: c
Explanation: At boiling point of liquids, its temperature remains constant.

5.Contact force is another name for ________
a) Friction
b) Magnetic force
c) Electrostatic force
d) Muscular force

Answer: d
Explanation: Contact force is another name for Muscular force.

6. Fuse wire is made of an alloy of
a) Tin and Lead
b) Tin and Copper
c) Lead and Copper
d) Copper and Silver

Answer: a
Explanation: An electrical fuse is a safety device in the circuit that protects electrical systems by breaking the connection when a short circuit is occurring. The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting point.

7. In the electrical circuit of a house, the fuse acts as
a) A load
b) A thermopile
c) A safety device
d) A step down device

Answer: c
Explanation: In the electrical circuit of a house, the fuse acts as a safety device.

8. The nature of fuse wire is
a) High resistance and low melting point.
b) High resistance and high melting point.
c) Low resistance and high melting point.
d) Low resistance and low melting point.

Answer: a
Explanation: The nature of fuse wire is high resistance and low melting point.

9. Which of these is exhibiting kinetic energy?
a) An archer with a flexed bow
b) A person sitting on a couch while watching TV
c) A space station orbiting Earth
d) All of the above

Answer: c
Explanation: A space station orbiting Earth is exhibiting kinetic energy.

10. An object having the capability to do work is said to possess
a) Inertia
b) Force
c) Pressure
d) Energy

Answer: d
Explanation: An object having the capability to do work is said to possess Energy.