Top Physics 1000 MCQs

Top Physics MCQs

چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔

If sin is positive and cos is negative, in which quadrant is the angle?

First quadrant
Second quadrant
Third quadrant
Fourth quadrant

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

The time taken by an oscillator to complete one oscillation is called?

Frequency
Wavelength
Time Period
Amplitude

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

Formula of centripetal force is?

F = ma
F = mv²/r
F = mr²
F = mgh

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

Transverse waves move?

Parallel to the direction of wave
In a circular path
Perpendicular to the direction of wave
Backward and forward

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

V₂O₅ catalyst is used in which industrial process?

Haber Process
Contact Process
Solvay Process
Ostwald Process

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

Magnetic field in wire (like current move)?

Centre of wire
Outside of wire
Opposite
None of these

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

The difference between two points in space is called?

Area
Volume
Distance
Displacement

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

The velocity of a car travelling on a straight road in 36km/h^-1 at an instant of time. Now travelling with uniform acceleration for 10s, the velocity becomes exactly double if the wheel radius of the car is 25 cm then which of the following number is the closest to the number of revolution that the wheel makes during this 10s?

126
95
84
None of these

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

Step 1: Convert given velocities to m/s
Initial velocity:

$u = 36 km/h = 36 \times \frac{1000}{3600} = 10 m/s$

Final velocity:

$v = 2 \times 36 km/h = 72 km/h = 20 m/s$

Step 2: Find acceleration
Time $t = 10 s$

$v = u + a t$ $20 = 10 + a \times 10$ $a = 1 {m/s}^{2}$

Step 3: Distance travelled in 10 s

$s = u t + \frac{1}{2} a t^{2}$ $s = 10 \times 10 + \frac{1}{2} \times 1 \times 100$ $s = 100 + 50 = 150 m$

Step 4: Wheel circumference
Radius $r = 25 cm = 0.25 m$
Circumference:

$C = 2 π r = 2 π \times 0.25 = 0.5 π m$

Numerically:

$C \approx 1.5708 m$

Step 5: Number of revolutions

$N = \frac{s}{C} = \frac{150}{0.5 π} = \frac{150 \times 2}{π} = \frac{300}{π}$ $N \approx \frac{300}{3.1416} \approx 95.49$

A bomber drops a bomb, when it is vertically above the target. It misses the target because ______?

Horizontal component of the velocity of bomber
Vertical component of the velocity of bomber
Force of gravity
None of these

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

A current of 1A is flowing along positive x-axis through a straight wire of length 0.5m placed in a region of a magnetic field given by B = (2i + 4j)T. The magnitude and the direction of the force experienced by the wire respectively are ______?

2N, along positive z-axis
4N, along positive z-axis
3N, along positive z-axis
None of these

(0)

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

Step 1: Identify known quantities

Current $I = 1 A$
Length of wire $L = 0.5 m$
Direction of current: along positive $x$ -axis
→ We can represent the length vector as
$\vec{L} = 0.5 \hat{i} m$
Magnetic field $\vec{B} = (2 \hat{i} + 4 \hat{j}) T$

Step 2: Magnetic force on a straight wire
Formula:

$\vec{F} = I (\vec{L} \times \vec{B})$

Substitute:

$\vec{F} = 1 \times [(0.5 \hat{i}) \times (2 \hat{i} + 4 \hat{j})]$

Step 2: Magnetic force on a straight wire
Formula:

$\vec{F} = I (\vec{L} \times \vec{B})$

Substitute:

$\vec{F} = 1 \times [(0.5 \hat{i}) \times (2 \hat{i} + 4 \hat{j})]$

Step 3: Compute the cross product

$(0.5 \hat{i}) \times (2 \hat{i}) = 0.5 \times 2 (\hat{i} \times \hat{i}) = 1 \times 0 = 0$ $(0.5 \hat{i}) \times (4 \hat{j}) = 0.5 \times 4 (\hat{i} \times \hat{j}) = 2 \hat{k}$

So:

$\vec{F} = 2 \hat{k} N$

Step 4: Magnitude and direction
Magnitude: $∣ \vec{F} ∣ = 2 N$
Direction: along positive $z$ -axis.

PHYSICS

If sin is positive and cos is negative, in which quadrant is the angle?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

The time taken by an oscillator to complete one oscillation is called?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

Formula of centripetal force is?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

Transverse waves move?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

V₂O₅ catalyst is used in which industrial process?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

Magnetic field in wire (like current move)?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

The difference between two points in space is called?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

A bomber drops a bomb, when it is vertically above the target. It misses the target because ______?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

A current of 1A is flowing along positive x-axis through a straight wire of length 0.5m placed in a region of a magnetic field given by B = (2i + 4j)T. The magnitude and the direction of the force experienced by the wire respectively are ______?

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

MCQs Categories

Latest Past Papers

Videos Lectures

PHYSICS

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

اس سوال کو وضاحت کے ساتھ پڑھیں

Explanation

MCQs Categories

Latest Past Papers

Videos Lectures

Sign Up

Sign In

Forgot Password