Question: The S.I.unit of electric charge is:
1. coulomb
2. ampere
3. e.s.u
4. kelvin
Answer: 1
Question: Light beam which is highly directional is called:
1. laser
2. eraser
3. maser
4. grazer
Answer: 1
Question: Which colour of light shows maximum deviation when passed through a prism?
1. Red
2. White
3. Violet
4. Green
Answer: 3
Question: Food is readily cooked in a pressure cooker because
1. Boiling occurs at high temperature
2. Boiling occurs at low temperature
3. Pressure remains constant
4. The cooking material cannot come out
Answer: 1
Question: The force that causes a spring to eventually return to its normal length is called
1. Potential force
2. Gravitational force
3. Spring force
4. Restoring force
Answer: 4
Question: Echoes are due to
1. Refraction of sound waves
2. Polarisation of sound waves
3. Diffraction of sound waves
4. Reflection of sound waves
Answer: 4
Question: The black hole theory was discovered by
1. S. Chandrashekhar
2. Har Gobind Khorana
3. C. V. Raman
4. S. Ramanujan
Answer: 1