Q. What is the power consumed by a device that operates at 120 V and draws a current of 2 A?
A.
240 W
B.
60 W
C.
120 W
D.
30 W
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Solution
Power (P) is calculated using the formula P = V * I. Therefore, P = 120 V * 2 A = 240 W.
Correct Answer:
A
— 240 W
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Q. What is the power consumed by a device that operates at 120 volts and draws a current of 3 amperes?
A.
360 W
B.
40 W
C.
120 W
D.
240 W
Show solution
Solution
Power P is calculated using P = V * I. Therefore, P = 120 V * 3 A = 360 W.
Correct Answer:
A
— 360 W
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Q. What is the power consumed by a device that operates at 120V and draws a current of 3A? (2021)
A.
360 W
B.
240 W
C.
120 W
D.
30 W
Show solution
Solution
Power (P) = Voltage (V) × Current (I) = 120V × 3A = 360W.
Correct Answer:
A
— 360 W
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Q. What is the power consumed by a device that operates at a voltage of 120 volts and draws a current of 3 amperes?
A.
360 watts
B.
40 watts
C.
120 watts
D.
240 watts
Show solution
Solution
Power (P) is calculated as P = V * I. Thus, P = 120 V * 3 A = 360 W.
Correct Answer:
A
— 360 watts
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Q. What is the primary aim of the National Rural Livelihood Mission (NRLM)? (2011)
A.
To provide free education
B.
To promote self-employment and organization of rural poor
C.
To enhance agricultural productivity
D.
To provide health insurance
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Solution
The primary aim of the NRLM is to promote self-employment and organize the rural poor into self-help groups.
Correct Answer:
B
— To promote self-employment and organization of rural poor
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Q. What is the primary cause of ocean currents?
A.
Wind patterns
B.
Earth's rotation
C.
Temperature differences
D.
Salinity differences
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Solution
The primary cause of ocean currents is wind patterns, which drive the movement of water across the surface.
Correct Answer:
A
— Wind patterns
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Q. What is the primary cause of sediment transport in rivers?
A.
Gravity
B.
Wind
C.
Human activity
D.
Temperature changes
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Solution
Gravity is the primary force that causes sediment to be transported downstream in rivers.
Correct Answer:
A
— Gravity
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Q. What is the primary cause of wind?
A.
Earth's rotation
B.
Temperature differences
C.
Humidity differences
D.
Pressure differences
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Solution
Wind is primarily caused by differences in atmospheric pressure.
Correct Answer:
D
— Pressure differences
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Q. What is the primary characteristic of metals? (2019)
A.
Brittleness
B.
Luster
C.
Dullness
D.
Insulation
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Solution
Metals are known for their luster, which is the shiny appearance they exhibit when polished.
Correct Answer:
B
— Luster
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Q. What is the primary characteristic of non-metals?
A.
Good conductors of heat
B.
High density
C.
Brittleness
D.
Luster
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Solution
Non-metals are generally brittle in solid form and do not exhibit metallic luster.
Correct Answer:
C
— Brittleness
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Q. What is the primary characteristic that distinguishes metals from non-metals? (2019)
A.
Luster
B.
Brittleness
C.
Conductivity
D.
Density
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Solution
Metals are generally good conductors of heat and electricity, while non-metals are poor conductors.
Correct Answer:
C
— Conductivity
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Q. What is the primary characteristic that distinguishes solids from liquids? (2021)
A.
Solids have a definite shape and volume
B.
Liquids have a definite shape and volume
C.
Solids can flow
D.
Liquids can be compressed easily
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Solution
Solids maintain a definite shape and volume due to closely packed particles, while liquids take the shape of their container but have a definite volume.
Correct Answer:
A
— Solids have a definite shape and volume
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Q. What is the primary component of the cell wall in plant cells?
A.
Cellulose
B.
Chitin
C.
Peptidoglycan
D.
Lipid
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Solution
The cell wall of plant cells is primarily made of cellulose, providing structural support.
Correct Answer:
A
— Cellulose
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Q. What is the primary component of the Earth's crust? (2021)
A.
Iron
B.
Silicon
C.
Oxygen
D.
Aluminum
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Solution
The Earth's crust is primarily composed of oxygen, which combines with silicon to form silicate minerals.
Correct Answer:
C
— Oxygen
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Q. What is the primary composition of the Earth's crust? (2022)
A.
Basalt and granite
B.
Iron and nickel
C.
Silicate minerals
D.
Water and gases
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Solution
The Earth's crust is primarily composed of basalt (oceanic crust) and granite (continental crust).
Correct Answer:
A
— Basalt and granite
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Q. What is the primary composition of the Earth's inner core?
A.
Solid iron
B.
Liquid iron
C.
Silicate rocks
D.
Water
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Solution
The inner core is primarily composed of solid iron, along with some nickel.
Correct Answer:
A
— Solid iron
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Q. What is the primary composition of the Earth's outer core? (2022)
A.
Solid rock
B.
Liquid iron and nickel
C.
Silicate minerals
D.
Granite
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Solution
The outer core is primarily composed of liquid iron and nickel, which is crucial for generating the Earth's magnetic field.
Correct Answer:
B
— Liquid iron and nickel
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Q. What is the primary factor that affects climate in a region? (2022)
A.
Altitude
B.
Latitude
C.
Longitude
D.
Population density
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Solution
Latitude is the primary factor that affects climate in a region, as it determines the angle of sunlight received.
Correct Answer:
B
— Latitude
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Q. What is the primary factor that affects the soil erosion rate in riverbanks? (2023)
A.
Soil type
B.
Vegetation cover
C.
Water flow speed
D.
All of the above
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Solution
All of the above factors affect soil erosion rate.
Correct Answer:
D
— All of the above
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Q. What is the primary factor that affects the state of matter?
A.
Temperature
B.
Pressure
C.
Volume
D.
Density
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Solution
Temperature is the primary factor that affects the state of matter by influencing particle energy.
Correct Answer:
A
— Temperature
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Q. What is the primary focus of the Beti Bachao Beti Padhao scheme? (2015)
A.
To promote women's entrepreneurship
B.
To improve the sex ratio and promote education for girls
C.
To provide financial assistance to women
D.
To enhance women's health services
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Solution
The Beti Bachao Beti Padhao scheme focuses on improving the sex ratio and promoting education for girls.
Correct Answer:
B
— To improve the sex ratio and promote education for girls
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Q. What is the primary function of carbohydrates in the body?
A.
Building tissues
B.
Providing energy
C.
Regulating hormones
D.
Transporting nutrients
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Solution
The primary function of carbohydrates in the body is to provide energy, especially for the brain and muscles.
Correct Answer:
B
— Providing energy
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Q. What is the primary function of dietary fats?
A.
Energy storage
B.
Building muscle
C.
Regulating metabolism
D.
Enhancing immunity
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Solution
The primary function of dietary fats is energy storage, providing 9 calories per gram.
Correct Answer:
A
— Energy storage
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Q. What is the primary function of fats in the diet?
A.
Energy storage
B.
Muscle building
C.
Bone health
D.
Immune function
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Solution
Fats primarily serve as energy storage, providing 9 calories per gram.
Correct Answer:
A
— Energy storage
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Q. What is the primary function of root hairs in plants?
A.
Photosynthesis
B.
Water absorption
C.
Nutrient storage
D.
Gas exchange
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Solution
Root hairs increase the surface area of roots, enhancing the plant's ability to absorb water and nutrients from the soil.
Correct Answer:
B
— Water absorption
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Q. What is the primary function of the cell membrane?
A.
To provide energy to the cell
B.
To control the movement of substances in and out of the cell
C.
To store genetic information
D.
To synthesize proteins
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Solution
The cell membrane regulates what enters and exits the cell, maintaining homeostasis.
Correct Answer:
B
— To control the movement of substances in and out of the cell
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Q. What is the primary function of the circulatory system in the human body?
A.
To digest food
B.
To transport nutrients and oxygen
C.
To regulate body temperature
D.
To produce hormones
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Solution
The circulatory system is responsible for transporting nutrients, oxygen, and waste products throughout the body.
Correct Answer:
B
— To transport nutrients and oxygen
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Q. What is the primary function of the digestive system? (2020)
A.
To absorb nutrients
B.
To circulate blood
C.
To regulate temperature
D.
To protect against pathogens
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Solution
The primary function of the digestive system is to break down food and absorb nutrients, making option 1 the correct answer.
Correct Answer:
A
— To absorb nutrients
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Q. What is the primary function of the Election Commission of India?
A.
Conducting elections
B.
Amending the Constitution
C.
Legislating laws
D.
Appointing judges
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Solution
The primary function of the Election Commission of India is to conduct free and fair elections in the country.
Correct Answer:
A
— Conducting elections
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Q. What is the primary function of the integumentary system?
A.
To protect the body
B.
To regulate temperature
C.
To provide sensory information
D.
All of the above
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Solution
The integumentary system, which includes the skin, hair, and nails, serves to protect the body, regulate temperature, and provide sensory information.
Correct Answer:
D
— All of the above
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