Question: To measure the speed of an approaching car a police officer shines?

• 1. light waves on it
• 2. microwaves on it
• 3. radio waves on it
• 4. ultra high frequency waves on it

Question: Rainbow is seen after rain because of hanging molecules of water which act as __________?

• 1. Lens
• 2. Prism
• 3. Mirror
• 4. Slabs

Question: A bird sitting on a high tension electric wire does not get electrocuted because:

• 1. Sit has high resistance
• 2. the body is earthed
• 3. it does not form a closed path for the flow of current
• 4. its feet are good insulators

Question: A person wears spectates with concave lenses. It means that normally (when not using glasses), the image of distant objects is focused in his eyes:

• 1. behind the retina
• 2. in front of the retina
• 3. on the retina
• 4. on the blind spot

Question: CGS system of units is also called __________?

• 1. Metric system
• 2. Metric or French system of units
• 3. Metric or British system of units
• 4. None of these

Question: The power is the dot product of ___________ quantities.

• 1. Force and time
• 2. Force and velocity
• 3. Force and speed
• 4. None of these

Question: Kirchhoff’s 2nd rule is related to: ___________?

• 1. IR Drops
• 2. Battery emf
• 3. junction voltages
• 4. both “1” and “2”

Question: Matter itself has energy called ________?

• 1. Potential energy
• 2. Rest energy
• 3. Chemical energy
• 4. Nuclear energy

Question: The unit of force in CGS, system is __________?

• 1. Newton
• 2. Pound
• 3. Dyne
• 4. None of these

Question: Mohus scale is used for to measure ____________?

• 1. Hardness
• 2. Humidity
• 3. Pressure
• 4. Temperature