Q.1

A resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is

  • 132 mW
  • 13.2 mW
  • 22.6 mW
  • 226 mW
Q.2

A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is

  • 8.57%
  • 42.85%
  • 4.28%
  • 85.7%
Q.3

How many watt-hours representW used forh?

  • 11.7 Wh
  • 1,170 Wh
  • 11,700 Wh
  • 117,000 Wh
Q.4

A resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is

  • 132 mW
  • 13.2 mW
  • 22.6 mW
  • 226 mW
Q.5
Energy ___________________ drives our energy world.
  • creation
  • conversion
  • conservation
  • None of these
Q.6
Which of the following is NOT an example of a non-renewable energy source?
  • Coal
  • Nuclear
  • Hydro
  • Oil
Q.7
Stored energy in the form of position or condition.
  • potential energy
  • kinetic energy
  • momentum
  • mechanical energy
Q.8
Energy in the form of motion.
  • mechanical energy
  • potential energy
  • kinetic energy
  • momentum
Q.9
The ability to do work or cause change:
  • work
  • energy
  • momentum
  • power
Q.10
What is the unit of energy that electrical companies use?
  • kJ
  • kW
  • kJ/hour
  • kW/hour
Q.11
Is the amount of energy being transferred over a period of time.
  • Power
  • Energy
  • Seconds
  • Joules
Q.12
Which situation is work not done?
  • lifting a 20 pound box off the floor
  • holding a 20 pound box above the floor
  • sliding a 20 pound box across the floor
  • sliding a 20 pound box up an inclined plane
Q.13
What is the unit of measurement for power?
  • Joules
  • Watts
  • Voltage
  • Calories
Q.14
Where is the kinetic energy of pendulum at its highest?
  • at the top of the swing
  • at the bottom of the swing
  • at 1/4 of the swing
  • at 3/4 of the swing
Q.15
The SI Unit for Energy is
  • Joule
  • Newton
  • Calorie
  • Watt
Q.16
What is the difference between calculating power and work?
  • Power takes into account the time it takes to complete a task
  • Work takes into account the time it takes to complete a task
  • Power is force/area
  • Work is force/area
Q.17
A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object?
  • 18 m
  • 4 m
  • 10 m
  • 6 m
Q.18
The first hydroelectric plant was set up at
  • Darjeeling
  • Assam
  • Karnataka
  • None of these
Q.19
Petroleum occurs in this type of rocks
  • Sedimentary
  • Igneous
  • Metamorphic
  • None of these
Q.20
Breeding and rearing of fish for food
  • Pissiculture
  • Horticulture
  • Agriculture
  • None of these
Q.21
Petroleum is called
  • Black gold
  • Black stone
  • Black dot
  • All of above
Q.22
Best quality coal
  • Lignite
  • Anthracite
  • Bituminous
  • Both A & B
Q.23
Hydroelectric project on river Satluj
  • Rihand
  • Bhakra Nangal
  • Koyna
  • All of above
Q.24
Wind mills are installed in aresa with
  • High wind velocity
  • Low WIND velocity
  • Moderate wind velocity
  • None of these
Q.25
Large concave reflectors are used in
  • Solar power plants
  • Solar thermal appliances
  • Solar panels
  • All of above
Q.26
Solar power generator are used for
  • Community lightening
  • Calculators
  • Toys
  • All of above
Q.27
Energy of future is
  • Renewable sources of energy
  • Non-renewable sources of energy
  • Both
Q.28
As a candle burns, the chemical energy stored in the wax is transferred into
  • Heat and Light
  • Heat and Magnetism
  • Electricity and Light
  • Electricity and Magnetism
Q.29
Which of the following activities involves work?I Pulling a coconut treeII Stretching a springIII Jumping on the spotIV Leaning against a wall
  • I and II
  • II and III
  • III and IV
  • I and IV
Q.30
Which form of energy is being converted to electrical energy by the batteries in a flashlight?
  • Chemical
  • Nuclear
  • Solar
  • Sound
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