All Free Physics MCQs with Answers
Every Physics question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
13,934 questions · page 660 of 697
- A. 250
- B. 100
- C. 150
- D. 200
Explanation: Explanation: Collector currect: Ic = 10mA = 10 × 10-3 A Base current = IB = 50μA = 50 × 10-6 A Current gain = β = ?As we know that, β = Ic…
Correct answer: 200- A. 0°
- B. 270°
- C. 360°
- D. 180°
Explanation: Explanation:When an operational amplifier is used as an inverting amplifier, the output terminal with a phase shifted of 180°.
Correct answer: 180°- A. 10-5 cm
- B. 10-6 m
- C. 10-6 mm
- D. 10-6 µm
Explanation: The base region in a transistor is the central area that is lightly doped compared to the emitter and collector regions.
Correct answer: 10-6 m- A. Neutral (0)
- B. Positive
- C. Negative
- D. Variable
Explanation: An N-type semiconductor is doped with pentavalent elements, which introduce additional free electrons.
Correct answer: Neutral (0)- A. P.E. = 300 J and K.E. = 180 J
- B. P.E. = 180 J and K.E. = 300 J
- C. P.E. = 230 J and K.E. = 250 J
- D. P.E. = 250 J and K.E. = 230 J
Explanation: Explanation:At point A, P.E = 480 JSince, P.E = mgh 480 = 6 × 10 × h h = 480 / 60 h = 8m above groundAt B, having fallen 3m, height above…
Correct answer: P.E. = 300 J and K.E. = 180 J- A. 5 m/s
- B. 10 m/s
- C. 15 m/s
- D. 20 m/s
Explanation: Given: Distance = S = 5m Acceleration = a = g = 10ms-2 Initial velocity = Vi = 0 ms-1 Final velocity = Vf = ?
Correct answer: 10 m/s- A. 0.15 J
- B. 4.3 J
- C. 4.4 J
- D. 4.6 J
Explanation: Potential Energy Gain:The fish gains potential energy due to its change in height.
Correct answer: 4.6 J- A. 1000 watt
- B. 100 watt
- C. 10 watt
- D. 0.10 watt
Explanation: Power is the amount of energy transferred or converted per unit time.Power = energy / timeGiven that,Work done = 100JTime taken= 10sPower…
Correct answer: 10 watt- A. 20 J
- B. 120 J
- C. 30 J
- D. 0.02 J
Explanation: The energy consumed by a 60-watt bulb in 2 seconds can be calculated using the power formula: P = E/t.
Correct answer: 120 J- A. VI
- B. I2R
- C. V2/R
- D. All of the above
Explanation: The correct answer is D, 'All of the above', because each option provides a valid formula for calculating power in an electrical circuit.
Correct answer: All of the above13191. 1KWh= _ J?
- A. 3.6J
- B. 3.6KJ
- C. 3.6MJ
- D. 3.6 GJ
Explanation: C is the correct option since 1 MJ = 10⁶ J, and we calculated 1 kWh = 3.6 × 10⁶ J = 3.6 MJ.
Correct answer: 3.6MJ- A. 25 W
- B. 0.5 W
- C. 0.75 W
- D. 1 W
Explanation: W=2.0N×1.0m=2.0JNext, the time taken to lift the weight is 4 seconds. Now we can find the power:P =work/time=2/4=0.5Watt
Correct answer: 0.5 W- A. Metals
- B. Solids
- C. Fluids
- D. Soil
Explanation: For transverse waves the displacement of the medium is perpendicular to the direction of propagation of the wave.Transverse waves cannot…
Correct answer: Fluids- A. Doppler Effect
- B. Beats
- C. Interference
- D. All of the above
Explanation: Explanation:The Doppler effect is the phenomenon where the frequency of a wave (such as light or sound) appears to change when the source…
Correct answer: Doppler Effect13195. The information received at the other end of a fibre can be inaccurate due to of the light signal.
- A. Longer wavelengths
- B. Frequency
- C. Intensity
- D. Dispersion or Spreading
Explanation: Explanation:Dispersion is a phenomenon in which the different wavelengths of light travel at different speeds through a fibre, causing the…
Correct answer: Dispersion or Spreading- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The formula to calculate the apparent frequency (f°) of a sound wave due to the Doppler effect is given by:f°= (V± Uo/ V± Ui) × fwhere V…
Correct answer: Option B- A. 2-2000 kHz
- B. 15-50000 kHz
- C. 20-20000 Hz
- D. 20-20000 kHz
Explanation: Hearing range describes the range of frequencies that can be heard by humans or other animals, though it can also refer to the range of…
Correct answer: 20-20000 Hz- A. Un-powered and guided.
- B. Un-guided and powered.
- C. Powered and guided.
- D. Un-powered and un-guided.
Explanation: A ballistic missile follows a ballistic trajectory, these missiles are propelled by a rocket engine for only the first part of its flight…
Correct answer: Un-powered and un-guided.- A. The angle of projection
- B. The initial velocity of projection
- C. The mass of the projectile
- D. Speed and mass of the projectile
Explanation: The horizontal range of a projectile is primarily determined by the angle of projection for a given initial velocity.
Correct answer: The angle of projection- A. v0 sin(θ) / g
- B. 2v0 sin(θ) / g
- C. v0 cos(θ) / g
- D. 2v0 cos(θ) / g
Explanation: The correct formula for the time of flight of a projectile is 2v0 sin(θ) / g, where v0 is the initial velocity, θ is the launch angle, and…
Correct answer: 2v0 sin(θ) / g