A bulb intended to light a room takes 100 J of electrical energy per unit time. The efficiency of the bulb, if 30 J of the energy is converted to heat is:

Question 1

Answer · 2026-03-24T06:04:07.599Z

Step 1: Analyze Question 1. A vector quantity has both magnitude and direction. A scalar quantity has only magnitude. A) Distance (scalar), Work done (scalar). B) Weight (vector), Temperature (scalar). C) Velocity (vector), Acceleration (vector). D) Speed (scalar), Mass (scalar). Option B correctly identifies a vector (weight) and a scalar (temperature). The final answer is B --- Step 1: Analyze Question 2. The International System of Units (SI) defines seven base units. These are meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (thermodynamic temperature),

Question 2

Step 1: Analyze Question 1. A vector quantity has both magnitude and direction. A scalar quantity has only magnitude. A) Distance (scalar), Work done (scalar). B) Weight (vector), Temperature (scalar). C) Velocity (vector), Acceleration (vector). D) Speed (scalar), Mass (scalar). Option B correctly identifies a vector (weight) and a scalar (temperature). The final answer is B --- Step 1: Analyze Question 2. The International System of Units (SI) defines seven base units. These are meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (thermodynamic temperature),

A bulb intended to light a room takes 100 J of electrical energy per unit time. The efficiency of the bulb, if 30 J of the energy is converted to heat is:

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