81: The unit of electric current is
Answer: Ampere
82: How many surface edges does a prism have?
Answer: 4
83: If the mass of an object is ‘m’ kg and its velocity is ‘v’ m/s, then its kinetic energy (k) is
Answer: k = 1/2mv²
84: White light can be said to be
Answer: Polychromatic
85: The reason for the twinkling of stars is
Answer: Reflection
86: Which of these does not change electric potential?
Answer: V²/R
87: An electric bulb is connected to a generator of 220V. The current value is 0.50A. What is the power of the bulb?
Answer: 110W
88: According to Ohm’s law, which of the following is correct?
Answer: I = V/R
89: When several resistors are connected in series, the equivalent resistance is equal to:
Answer: R = R₁ + R₂ + R₃
90: Which of the following is not a vector quantity?
Answer: Speed
91: Which of the following cannot be a unit of acceleration?
Answer: km/s
92: A bus accelerates from 36 km/h to 72 km/h in 10 seconds. What is its acceleration?
Answer: 3.6 m/s²
93: What does the slope of the speed-time graph represent?
Answer: Velocity
94: Which of the following is the correct relationship?
Answer: v = u + at
95: The inertia of a moving object depends on:
Answer: The mass of the object
96: When toothpaste is squeezed, its shape changes. What force is responsible for this?
Answer: Unbalanced force
97: On which conservation principle does a rocket operate?
Answer: Momentum
98: One Newton is equal to:
Answer: 10⁵ dynes
99: The unit of momentum is:
Answer: kg m/s
100: The rate of change of momentum is equal to:
Answer: Force