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