A brass ball is tied to a thin wire and swung so as to move uniformly in a horizontal circle. Which of the following statements in this regard is/are true?

1. The ball moves with constant velocity
2. The ball moves with constant speed
3. The ball moves with constant acceleration
4. The magnitude of the acceleration of the ball is constant

Select the correct answer using the code given below:

• 1 only

• 1 and 3

• 1, 2 and 4

• 2 and 4 only

Two long wires each carrying a d.c. current in the same direction. are placed close to each other. Which one of the following statements is correct?

• The wires will attract each other

• The wires will repel each other

• There will be no force between the wires

• There will be a force between the wires only at the moment when the current is switched ON or OFF

The first Indian Satellite, Aryabhatt, was launched in the year:

• 1972

• 1975

• 1976

• 1979

Which one of the following sea routes is the shortest from point to point?

• Kolkata to Yangoon

• Kolkata to Chennai

• Chennai to Port Blair

• Mumbai to Colombo

Which one of the following is not a Green House Gas?

• Water vapours

• Methane

• Ozone

• Carbon Monoxide

Muscle fatigue is due to the accumulation of:

• Cholesterol

• Lactic acid

• Lipoic acid

• Triglycerides

7.

The absolute zero, i.e., temperature below which is not achievable, is about:

• 0°C

• -273 K

• -273°C

• -300°C

Lightning conductors are used to protect building from lightning strikes. Which of the following statements is/are true about lightning conductors?

1. Lightning conductors create an electric field at its top so that lightning strikes it preferentially
2. Lightning conductors reduce the effect of the strike by uniformly distributing the charge (current) over the surface of the building
3. Lightning conductors take all charge (current) to deep down in the earth
4. Lightning conductors must be installed at a place taller than the building

Select the correct answer using the code given below:

• 1 and 2

• 3 and 4 only

• 1, 3 and 4

• 4 only

Match List-I with List-II

List I (Manufacturing site)

1. Ludhiana
2. Kanpur
3. Varanasi
4. Vijayawada

List II (Industry)

1. Auto parts
2. Woollen garments
3. Leather
4. Handloom

• (a) - 1, (b) - 4, (c) - 3, (d) - 2

• (a) - 2, (b) - 3, (c) - 4, (d) - 1

• (a) - 2, (b) - 4, (c) - 3, (d) - 1

• (a) - 1, (b) - 3, (c) - 4, (d) - 2

Which one of the following is not a sea port?

• Paradeep

• Haldia

• Diamond Harbour

• Dhamra