Question: A Jet engine works on the principle of conversation of:
1. linear momentum
2. enrgy
3. angular momentum
4. mass
Answer: 1
Question: The lines of force of a uniform magnetic field:
1. must be divergent
2. must be convergent
3. must be parallel to teach other
4. intersect
Answer: 1
Question: Light travels slower in glass than in air because:
1. density of glass is less than that of air
2. density of glass is greater than that of air.
3. refractive index of air is greater than that of glass.
4. refractive index of air is less than that of glass.
Answer: 4
Question: The velocity of sound is maximum in –
1. Vacuum
2. Metal
3. Liquid
4. Air
Answer: 2
Question: When you pull out the plug connected to an electrical appliance, you often observe a spark. To which property of the appliance, is this related?
1. Capacitance
2. Resistance
3. Inductance
4. Wattage
Answer: 1
Question: Which of the following is a physical change?
1. Boiling of Water
2. Rusting of Iron
3. Boiling of an Egg
4. Burning of Candle
Answer: 1
Question: In an atom no two electrons have all the four quantum numbers identical. This is known as
1. Paulis Exclusion principle
2. Hunds Rule
3. Aufbau Principle
4. Avogadros Law
Answer: 1
Question: Tides are primarily a result of the –
1. Attraction of the moon
2. Farrel’s Law
3. Ocean currents
4. Pressure system of the earth
Answer: 1
Question: The position, relative size and nature of the image formed by a concave lens for an object placed at infinity are respectively –
1. at focus, diminished and virtual
2. at focus, diminished and real
3. between focus and optical centre, diminished and virtual
4. between focus and optical centre, magnified and real
Answer: 3
Question: Gamma rays have greatest similarity with
1. a-rays
2. b-rays
3. X-rays
4. U.V.rays
Answer: 3
Question: Two 220 V, 60 W bulbs are used for 5 hours a day for 10 days. If each unit (1 kilowatt hour) costs Rs. 3.50, find the total expense for it –
1. Rs. 10.50
2. Rs. 38.50
3. Rs. 77.00
4. Rs. 21.00
Answer: 4