JEE Physics Practice Test
Ten questions on mechanics, electricity and optics to check your basics before you move on to harder JEE problems. Take g as 10 m/s² where needed.
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Question 1 of 10
A ball is dropped from rest. What is its speed after 2 seconds? (g = 10 m/s²)
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Answer: 20 m/s. Using v = u + gt: v = 0 + 10 × 2 = 20 m/s.
Question 2 of 10
At what launch angle is the range of a projectile greatest on level ground, ignoring air resistance?
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Answer: 45°. Range = u² sin 2θ / g, which is largest when sin 2θ = 1, so θ = 45°.
Question 3 of 10
If the speed of a body is doubled, its kinetic energy becomes:
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Answer: Four times. Kinetic energy = ½mv². Because it depends on v², doubling the speed makes it four times as large.
Question 4 of 10
What is the momentum of a 2 kg body moving at 3 m/s?
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Answer: 6 kg·m/s. Momentum p = mv = 2 × 3 = 6 kg·m/s.
Question 5 of 10
A 12 V battery is connected across a 4 Ω resistor. What current flows?
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Answer: 3 A. By Ohm's law, I = V / R = 12 / 4 = 3 A.
Question 6 of 10
What is the equivalent resistance of 6 Ω and 3 Ω connected in parallel?
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Answer: 2 Ω. 1/R = 1/6 + 1/3 = 1/2, so R = 2 Ω. A parallel combination is always smaller than its smallest resistor.
Question 7 of 10
The time period of a simple pendulum does NOT depend on:
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Answer: The mass of the bob. T = 2π√(L/g) for small swings. Mass does not appear in the formula.
Question 8 of 10
When light passes from air into glass, it bends:
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Answer: Towards the normal. Light slows down in a denser medium, so it bends towards the normal, as Snell's law describes.
Question 9 of 10
A force of 5 N moves a body 3 m in the direction of the force. How much work is done?
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Answer: 15 J. Work W = F × d = 5 × 3 = 15 J.
Question 10 of 10
Newton's first law of motion is also known as the law of:
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Answer: Inertia. A body keeps its state of rest or uniform motion unless a net force acts on it. This property is inertia.
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Written by StudyZone for revision. This is not an official exam paper. Always check the latest syllabus from the official exam body.