All Free Physics MCQs with Answers

• A. R
• B. R/3
• C. 3R
• D. R3

Explanation: The resistors are connected in series so their equivalent resistance would be the sum of resistances of all resistors.R+R+R=3R.

• A. 1000 Ω
• B. 100 Ω
• C. 1 Ω
• D. 10 Ω

Explanation: Given data Area, A= 1mm2 Resistivity, ρ= 10-6Ωm Thickness, x= 10-6m Now we have Resistance, R=ρl/A where A= = length (l) x thickness (x)…

• A. 5.6 Ω
• B. 3.33 Ω
• C. 0.33 Ω
• D. 6.6 Ω

Explanation: The total resistance can be found by using the method of successive reduction, as shown below

• A. 1.5A
• B. 3A
• C. 4.5A
• D. 6A

Explanation: Firstly, we'll calculate the resistance of the carbon resistor by using the formula Voltage= Current x Resistance.

• A. 2 Ohms
• B. 6 Ohms
• C. 3 Ohms
• D. 4 Ohms

Explanation: Resistor AD and DC are in series For series combination: Re=R1+R2 =AD+DC =3ohm+3ohm =6ohm, this is in parallel combination with resistor…

• A. Total
• B. Potential
• C. Initial kinetic
• D. None of these

Explanation: Escape velocity Is the velocity required by a body to get out of the earth's gravitational pull and leave the earth without further…

• A. 11 km/sec
• B. 10.4 km/sec
• C. 2.4 km/sec
• D. 4.3 km/sec

Explanation: The correct answer is Option C: 2.4 km/sec. The escape velocity for the Moon is approximately 2.374 km/sec.

• A. 3.59 x 10^7 m
• B. 4.23 x 10^7 m
• C. 8.86 x 10^7 m
• D. 6.96 x 10^6 m

Explanation: In this case, once the satellite has been launched, the gravitational force between the satellite and the moon would be providing the…

• A. Zero
• B. 90°
• C. 1
• D. -1

Explanation: Explanation:Since i and k are mutually perpendicular, thus angle is 90°, cos90° = 0, therefore scalar product is zero.

• A. Halved.
• B. Doubled.
• C. Unchanged.
• D. Increase four times.

Explanation: The time period of a pendulum does not depend on the mass of the bob. So if the mass of bob is doubled, the time period will remain…

• A. l
• B. 1/l
• C. √l
• D. 1/ √l

Explanation: f=1/2π √(g/l)2πf=√(g/l)Given that ω=2πf where ω is angular frequency,ω=√(g/l)ω∝1/√l

• A. Gravity
• B. Simple harmonic
• C. Uniform
• D. Projectile

Explanation: One of the conditions for the back and forth motion to be classified as Simple Harmonic Motion is the acceleration being directly…

• A. One fourth
• B. 3/4
• C. Half
• D. Double

Explanation: Explanation: T = 2π√m/kKeeping in mind the above relation, time period is directly proportional to the square root of mass.

• A. Extreme position
• B. Mean position
• C. Between extreme and mean position
• D. Beyond extreme position

Explanation: The correct answer is that the body is at the extreme position at t = T/4.

• A. T = g cos θ
• B. T = mg sin θ
• C. T = mg cos θ
• D. T = mg

Explanation: The correct answer is C: T = mg cos θ. In a simple pendulum, the tension in the string must balance the component of the gravitational…

• A. 1/4
• B. 1/2
• C. √2
• D. 1/√2

Explanation: f = 1/2π × √(g/L)where 'g' is the acceleration due to gravity and 'L' is the length of the pendulum.When the length of the pendulum is…

• A. Greater than natural frequency
• B. Unequal the natural frequency
• C. Less than natural frequency
• D. Equal to the natural frequency

Explanation: Resonance occurs when the driving frequency equals the natural frequency.

• A. T2=T1
• B. T2=2T1
• C. T2=√2T1
• D. T2=T1/(√2)

Explanation: Time period T for a mass attached to a spring can be calculated by using the following formula: T=2𝝅√m/k T1=2𝝅√m/k…

• A. π
• B. π/2
• C. π/4
• D. -π

Explanation: Inside the sin bracket we need π/2 to get us a 1 in order to satisfy the condition which is x=x0.

• A. Square root
• B. Square
• C. Third power
• D. Third root

Explanation: Speed of sound (v) in gas is directly proportional to square root of isothermal elasticity (K) i.e.