Physics Class 10th

81. Compare with a sound of 60 decibels, a sound of 80 Decibels has intensity _____- times greater.

A) 10

B) 100

C) 1000

D) 10000

82. The loudness of sound is most closely related to its:

A) Frequency

B) Period

C) Wavelength

D) Amplitude

83. Various instruments sound differently even when they play the same note due to difference in:

A) Pitch

B) Loudness

C) Quality

D) Intensity

84. Humans can hear sound that is:

A) Less than 20Hz

B) Between 20 Hz and 20 kHz

C) Greater than 20kHz

D) None

85. The speed of sound on warm day when the outdoor temperature is 38⁰C is:

A) 331m/s

B) 345 m/s

C) 354m/s

D) 362 m/s

86. Minimum echo distance reduced in:

A) Summer

B) Winter

C) Spring

D) Space

87. Which of the following cannot transmit sound:

A) Solid

B) Liquid

C) Gas

D) Vacuum

88. Electrostatic is study of charges at ______:

A) Motion

B) Rest

C) Both A and B

D) None

89. After running a plastic comb through our hair, it attracts small pieces of paper. This is an example of

A) Electrostatic induction

B) Kinematics

C) Magnetism

D) Dynamics

90. According to atomic theory, atoms and molecules hold together due to:

A) Magnetic Forces

B) Chemical Forces

C) Electrostatic Forces

D) None of the above

91. An inherent property of object is its:

A) Velocity

B) Mass

C) Gravity

D) Magnetism

92. An object with less mass is said to have a______ inertia as compared to an object of greater mass.

A) Smaller

B) Larger

C) Equal

D) Mass has no relation with inertia

93. Unit of Charge is:

A) Kg

B) s

C) C

D) None of the above

94. There are _____ types of charges.

A) One

B) Two

C) Three

D) Four

95. A glass rod rubbed with silk cloth brought near a suspended rubber rod rubbed with fur, _________ each other.

A) Attract

B) Repel

C) None of the above

D) Both rods shall posses no charge

96. Similar charges always attract each other.

A) True

B) False

97. Different charges always ______ each other.

A) Attract each other

B) Repel each other

C) Magnetize each other

D) None

98. The charge on electron is:

A) -1.6×10^-19

B) 1.6×10^19

C) 1.6×10^19

D) None of the above

99. Mass of proton is:

A) 9.109×10^-31

B) 1.673×10^-27

C) 1.675×10^-27

D) None the above

100. The neutron has:

A) Positive charge

B) No Charge

C) Negative charge

D) Bipolar