The time period of revolution of a geo-stationary satellite is -

1) 12 hrs.

2) 24 hrs.

3) 48 hrs.

4) 6 hrs.

Nickel-Cadminum (Ni-Cd) battery is used in -

1) Calculator

2) Cordless electronic appliances

3) Transistors

4) All of the above

India's multitask supersonic fighter plane was named "Tejas" by-

1) Atal Behari Bajpai

2) Air Marshal Jasbir Wali

3) Narendra Modi

4) Abdul Kalam

The 750 MW Rewa Ultra Mega Solar Plant is located in which of the following states ?

1) Kanpur, Uttar Pradesh

2) Nagpur, Maharashtra

3) Rewa, Madhya Pradesh

4) Hyderabad, Telangana

The Y-20 aircraft is a large military transport aircraft of which of the following countries?

1) Japan

2) India

3) China

4) France

Which one of the following statements about a satellite orbiting around the Earth is correct ?

1) Satellite is kept in orbit by remote control from ground station

2) Satellite is kept in orbit by retro-rocket and solar energy keeps it moving around the Earth

3) Staellite requires energy from solar panels and solid fuels for orbiting

4) Satellite does not require any energy for orbiting

Radioactivity is measured by -

1) GM Counter

2) Polarimeter

3) Calorimeter

4) Colorimeter

Which of the following fuels would produce minimum environmental pollution ?

1) Hydrogen

2) Diesel

3) Kerosene

4) Coal

An artificial satellite can be tracked very precisely from the earth by using -

1) Doppler effect

2) Radar

3) Sonar

4) Pulsar

A mobile phone charger is -

1) An inverter

2) A step up transformer

3) A step down transformer

4) A UPS

Which one of the following is not a natural hazard?

1) Earthquake

2) Tsunami

3) Flash flood

4) Nuclear accidents