Question : Match the following:
Quantity SI unit
1. Resistance a. Watt
2. Energy b. Ohm
3. Power c. Joule
Option 1: 1 - b, 2 - c, 3 - a
Option 2: 1 - a, 2 - c, 3 - b
Option 3: 1 - b, 2 - a, 3 - c
Option 4: 1 - c, 2 - a, 3 - b
Correct Answer: 1 - b, 2 - c, 3 - a
Solution : The correct option is 1- b, 2 - c, 3 - a.
The resistance of a substance or piece of equipment is a measure of how much it opposes the flow of electric current through it. The ohm (Ω) is the SI unit for resistance. Energy is a fundamental quantity that denotes the ability to perform work. The joule (J) is the SI unit of energy. Power is the rate at which work or energy is done or transferred. The watt (W) is the SI unit of power.
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Question : Which of the following is the correct statement?
Option 1: Joule is the unit of work
Option 2: The unit of energy is the watt.
Option 3: Joule/ second is also a unit of energy.
Option 4: The unit of power is joule/newton.
Question : Gliders depend on the following energy for their flight:
Option 1: wind energy
Option 2: electrical energy
Option 3: heat energy
Option 4: chemical energy
Question : The work done by the string of a simple pendulum during one complete oscillation is equal to
Option 1: The total energy of a pendulum
Option 2: Kinetic energy of the pendulum
Option 3: Potential energy of the pendulum
Option 4: Zero
Question : One calorie of heat energy is equivalent to approximately ____________ joules of mechanical energy.
Option 1: 0.24
Option 2: 0.48
Option 3: 2.4
Option 4: 4.2
Question : If both the mass and the velocity of a body are increased to twice their magnitude, the kinetic energy will increase by:
Option 1: 2 times
Option 2: 4 times
Option 3: 8 times
Option 4: 16 times
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